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Rani and Kajal are playing a card game using a standard 52 card deck.
Kajal will pick a card at random. If the card is a black card, she will win $5. If the card is a face card (jack, queen, or king), but not a black card, she will win $3. If she picks anything else, she will lose $10.
The image below shows a standard deck of playing cards.
What is Kajal's expected value of playing this game?
Answers
Answer:
not answered this question
Kajal's expected value of playing this game is -$1
Kajal's expected value of playing this gameThe given parameters are:
Picking a black ⇒ $5 (win)Picking a face card ⇒ $3 (win)Picking anything else ⇒ $10 (lose)There are 26 black cards in a standard 52 card decks.
So, we have:
P(Black) = 26/52
There are 6 face cards that are not black in a standard 52 card decks.
So, we have:
P(Face card and not black) = 6/52
There are 20 other cards not in the above categories.
So, we have:
P(Others) = 20/52
The expected value is then calculated as:
[tex]E(x) = \sum x * P(x)[/tex]
This gives
E(x) = 5 * 26/52 + 3 * 6/52 - 10 * 20/52
Evaluate the products
E(x) = 130/52 + 18/52 - 200/52
Evaluate the sum and difference
E(x) = (130 + 18 - 200)/52
This gives
E(x) = -52/52
Evaluate
E(x) = -1
Hence, Kajal's expected value of playing this game is -$1
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A ray of an angle that rotates about the center is called?
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A ray of an angle that rotates about the center is called terminal arm of that angle.
How does an angle form?An angle requires two straight line/ line segments/rays, such that they're connected on one of their endpoints.
The point of their joint is called vertex of that angle.
Those two line segments forming it are called arms of that angle.
One arm is fixed, and one arm rotates around that vertex to make angles of different different measurements.
The fixed arm is called initial arm/initial side.
The moving arm is called terminal arm/terminal side.
The angle is the degree of rotation that it will take for the moving side to go from initial side to the position it is currently on.
Thus, a ray of an angle that rotates about the center is called terminal arm of that angle.
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Estimate the perimeter of the figure to the nearest whole number.
perimeter: about
units
Answers
Answer:
i d k
Step-by-step explanation:
we cant see your figure so
(10^x/6) (10^x/8)=10^10
Answers
Answer:
(10^x/6)(10^x/8)=10^10
Exact Form: 6/253
In Decimal Form (rounded off): 0.02
Hope it helps! :)
As the sample size gets larger, what happens to the size of the correlation that is needed for significance?.
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If the sample size gets larger, the size of the correlation that is needed for significance will get smaller.
What will happen to the significance required when sample size increases?As the sample size gets larger, it's characteristics will become more and more like the population it is derived from which makes predictions more accurate.
As a result, the correlation size that is needed to decide significance will reduce. This tallies with the characteristic of the correletion coefficient to be lower when the sample size is greater.
Find out more on the correlation coefficient at https://brainly.com/question/4219149.
Someone help me with this question
Answers
Answer:
Step-by-step explanation:
Defining CB
CB is not the hypotenuse of triangle ABC. The hypotenuse is the longest side of any right triangle. CB is the other side other than the hypotenuse that makes up <C. It is the adjacent side because AC and CB make up angle C.
Defining Cos(C)
All of this makes up what you need to know to define the Cos(C)
Cos (C) = adjacent side / hypotenuse.
adjacent side = 6
Hypotenuse = 10
Cos(C) = 6/10
Answer: B
y = 3x + 1, -x + 2y = -3
Answers
Answer:
X= -1 y= -2
Step-by-step explanation:
y= 3x+1
y-1 =3x
X= y-1/3...(1)
-x+2y= -3
-(x-2y)= -3
x-2y=3
(y-1/3)-2y =3 (from eq (1))
y-1-6y =3×3
-5y= 10
y= -2
X= y-1/3
= -2-1/3
x = -1
The circumference of a round mirror is 32 inches. What is the radius of the mirror?
Answers
Answer:
r=C/2pi
r= 32/2pi. pi=3.1415. 2pi= 2×3.1415 =6.2831
given that C= 32, therefore r=32/6.2831 =5.0930.
A store offers a 30% discount on a coat that originally sold for $120. The coat still does not sell, so the store offers another 30% o the sale price. What is the difference between this price and the price of the coat had it been marked down 60% all at once?A. $5. 80 B. $7. 40C. C. $10. 8 D. No difference; the resulting prices are the same
Answers
Answer:
C. $10.80
Step-by-step explanation:
Lets solve for first 30% discount
120/ 10 =12 (divided by 10 to get 10% of the whole)
12= 10% of 120
36= 30 % of 120 (multiplied by 3 to get 30%)
120-36= 84
Lets solve for second 30% discount
84/10 =8.4 (divided by 10 to get 10% of the whole)
8.4= 10% of 84
25.2 = 30% of 84 (multiplied by 3 to get 30%)
84-25.2=58.80 (subtracted the discount from the total to get the sale price)
Let's solve for what it would cost had they done 60% to begin with
120/10 = 12 (divided by 10 to get 10% of the whole)
12= 10% of 120
72= 60% of 120 (multiplied by 6 to get 60%)
120-72 = 48 (subtracted the discount from the total to get the sale price)
Let's solve for the difference between the two
58.80-48= 10.80
Jasmyn is 4 years older than Sofie. three times Jasmyn age added to six times Sophie's age is 36. How old are Jasmyn and Sofie?
Answers
Answer:
Sophie is 2 and 8 months old
Jasmyn is 6 and 8 months old
Step-by-step explanation:
j = 4 + s
3j + 6s = 36
Solve for Sophie's age by substitution:
3(4 + s) + 6s = 36
12 + 3s + 6s = 36
12 + 9s = 36
9s = 24
s = 24/9 = 8/3 or 2 and 2/3
Sophie is 2 and 8 months old
Solve for Jasmyn's age:
j = 4 + s
j = 4 + 8/3
j = 12/3 + 8/3
j = 20/3 or 6 and 2/3
Jasmyn is 6 and 8 months old
I hope this helps!
Evaluate the expression.
52−4⋅6+11
Enter your answer in the box.
Answers
Answer: 39
Step-by-step explanation: PEMDAS
Hideki was given a rare coin 9 years ago. The value of the coin has increased $6 every year since it was given to him. It is now worth $76. Which equayion can Hideki use to find the value, v, of the coin after a years of owning it?
A. V=6a+22
B. V=6a+76
C. V=6a+130
D. V=9a+22
E. V=9a+130
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The question is an illustration of a linear function, and the value, v, of the coin after a year of owning it is (b) V = 6a + 76
How to determine the equation?The given parameters are:
Initial value = 76Rate = 6A linear function is represented as:
y = mx + c
Where m represents the rate, and c represents the initial value
This means that:
m = 6 and c = 76
So, we have:
y = 6x + 76
In terms of a and V, we have:
V = 6a + 76
Hence, the value, v, of the coin after a year of owning it is (b) V = 6a + 76
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At a skills competition, a target is being lifted into the air by a cable at a constant speed. an archer standing on the ground launches an arrow toward the target. the system of equations below models the height, in feet, of the target and the arrow t seconds after it was fired. which statement most likely describes the situation modeled by this system?
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The answer will be option 4.The arrow is fired with an initial upward velocity of 32 ft / s.
What is Velocity?
Velocity is defined as when an object travels to a particular distance with respect to time in a particular direction then it is termed as velocity. Velocity is a vector quantity.
By definition, the equation of movement in its generic form is given by:
[tex]h(t)=-\dfrac{1}{2}gt^2+v_ot+h_o[/tex]
Where,
g: acceleration due to gravity
[tex]v_o[/tex]: initial speed
[tex]h_o[/tex]: initial height
The equation for the arrow is given by:
[tex]h=4+32t-16t^2[/tex]
Then, according to the definition, the initial velocity of the arrow is:
[tex]v_o=32 \ \dfrac{m}{s}[/tex]
Hence the answer will be option 4.The arrow is fired with an initial upward velocity of 32 ft / s.
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Answer:
Step-by-step explanation:
d on edge i took the test
How many 30 degrees angles fit in a right angle?
Answers
Answer:
3
Step-by-step explanation:
A right angle is 90 degrees. 90/30=3
6 is the answer. hope this helpsssss
if x+3/3=y+2/2 then, x/3 = ?
Answers
Answer:
y-2
Step-by-step explanation:
x+3/3=y+2/2
cross multiply
2(x+3)=3(y+2)
2x+6=3y+2
2x=3y+2-6
2x=3y-4 (divide both sides by 2)
2x/2=3y-4/2
x=3y-2
therefore substitute x=3y-2 into x/3
3y-2/3
=y-2
What is the value of x?
Enter your answer in the box.
x =
Answers
17.3
52÷3=17.3
if i am mistaken
Those are vertical angles which are equal to each other:
2x + 2 = 3x - 52
Add 52 to both sides:
2x + 54 = 3x
Subtract 2x from both sides:
54 = x
Rewrite as x = 54
Earl made a 1/2 pan of brownies using 2/3 cup of sugar How much sugar will it take for a whole pan of brownie
Answers
Answer:
It will take 4/3 cup of sugar or 1 and 1/3 cup of sugar
Step-by-step explanation:
1/2 + 1/2= 1
2/3 + 2/3=4/3 or 1 and 1/3
hope this helps:)
Please help me i can’t figure it out
Answers
Answer:
51
Step-by-step explanation:
Always do parentheses first.
So 39-3=36
Then 36+6+3power of 2
36+6=42
42+3 power of 2
3 times 3 = 9
42+9=51
Answer:
51
Step-by-step explanation:
I got it right on the test
A circle's diameter is 4 feet.
What is the circle's circumference (use 3.14 for pi and round to the Nearest tenth)?
PLS HELP
Answers
Answer:
13
Step-by-step explanation:
The formula for cirmference is
C= π2 * r
we're using 3.14 as pi and r = radius.
the radius is always half of the diameter.
So in this case since the diamter is 4, the radius is 2. let's substitute these numbers.
C= 3.14 *2*2 and there your answer is 12.56 which rounded to the nearest tenth is 13.
Hope this helps :)
If humans lost the ability to see all color except one, which color would you want to survive?
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Answer:
The color blue. There’s many shades of blue and plus blue is my favorite color. I’ll be able to tell if I’m drinking water or not.
Which expressions result in an irrational number
Answers
Answer:
III ONLY
If right please make brainleist for others to learn from this answer thanks!
Step-by-step explanation:
Find x #4 please reallt emergency
Answers
Answer:
Step-by-step explanation:
3
6. If the information given represents an arithmetic
sequence, find the 27th term.
a_1 = 49 and a_8 = 14
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Since consecutive terms differ by a constant k in this sequence, we have
[tex]a_8 = a_7 + k[/tex]
[tex]a_8 = (a_6+k)+k = a_6+2k[/tex]
[tex]a_8 = (a_5+k)+2k=a_5+3k[/tex]
and so on down to
[tex]a_8 = a_1 + 7k[/tex]
Solve for k :
14 = 49 + 7k ⇒ -35 = 7k ⇒ k = -5
We then do the same as above but in the reverse direction:
[tex]a_9 = a_8+k[/tex]
[tex]a_{10} = a_9+k = a_8+2k[/tex]
[tex]a_{11} = a_{10}+k = a_8+3k[/tex]
and so on, up to
[tex]a_{27} = a_8 + 19k = \boxed{-81}[/tex]
For each order. Determine weather is a solution to x = -5
Solutions:
(-5,1)
(3,-5)
(9,2)
(-5,4)
Answers
(x,y)
So first and last are correct
Write equivalent fractions for 2/3 and3/5 using 15 as the common denominator
Answers
Answer:
2/3 would be 10/15 and 3/5 would be 9/15
Step-by-step explanation:
To get the common denominator of 15 you multiply the first fraction by 5 in the numerator and denominator and on the other fraction you multiply by 3 in the numerator and denominator.
Which of the following is least likely to be a warning sign that one's debt is at a critical point? a. all credit cards are at their limits b. having several credit cards c. making only minmum payments on credit cards d. using cash advances to pay bills please select the best answer from the choices provided. a b c d
Answers
The option which is least likely to be a warning sign that one's debt is at a critical point is having several credit cards.
What is a warning sign for credit cards?The most likely warning sign for credit cards is not paying or clearing the debt of the credit card in full each month.
The options given in the problem are,
a. All credit cards are at their limits. b. Having several credit cards. c. Making only minimum payments on credit cards. d. Using cash advances to pay bills.In these options, least likely to be a warning sign is having several credit cards as having multiple cards and well management of them required the carefulness and awareness.
Thus, the option which is least likely to be a warning sign that one's debt is at a critical point is having several credit cards.
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Variable g is 8 more than variable w. variable g is also 4 less than w. which pair of equations best models the relationship between g and w? g = w − 8 g = w 4 w = 8g w = g − 4 g = w 8 g = w − 4 w = 8g w = g 4
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A pair of equations best models the relationship between g and w are g = w + 8, and g = w - 4 option second is correct.
What is a linear equation?It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.
If in the linear equation, one variable is present, then the equation is known as linear equation in one variable.
We have :
Variable g is 8 more than variable w, mathematically we can write it as:
g = w + 8 ....(1)
Also, variable g is also 4 less than variable w, mathematically we can write it as:
g = w - 4 ....(2)
The equation (1) and equation (2) are representing the system of linear equation in two variables.
So, we have framed two linear equation, that is:
g = w + 8 and
g = w - 4
Thus, a pair of equations best models the relationship between g and w are g = w + 8, and g = w - 4 option second is correct.
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Answer:
b
Step-by-step explanation:
What is the approximate area of the triangle?
A. 12.5 square units
B. 18 square units
C. 21.5 square units
D. 31 square units
Answers
The solution is Option C.
The area of the triangle is 21.5 square units
What is a Triangle?
A triangle is a plane figure or polygon with three sides and three angles.
A Triangle has three vertices and the sum of the interior angles add up to 180°
Let the Triangle be ΔABC , such that
∠A + ∠B + ∠C = 180°
The area of the triangle = ( 1/2 ) x Length x Base
For a right angle triangle
From the Pythagoras Theorem , The hypotenuse² = base² + height²
Given data ,
Let the area of the triangle be A
Let the height of the triangle be H
The value of H = 7 units
Let the base of the triangle be B
The value of B = 6 units
Now , the area of the triangle is given by the equation
The area of the triangle = ( 1/2 ) x Length x Base
Substituting the values in the equation , we get
Area of Triangle = ( 1/2 ) x 7 x 6
Area of Triangle = 1/2 x 42
Area of Triangle = 42/2
Area of Triangle A = 21.5 square units
Therefore , the value of A is 21.5 units²
Hence , The area of the triangle is 21.5 square units
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The radius of a circle is 7 inches. What is the length of a 135º arc?
Answers
There are 12 boys and 15 girls in Mr. Fraioli’s math class. He will randomly call on one person to answer the problem of the day. What is the probability that he will choose a girl
Answers
n = 12 + 15 = 27
Probability of choosing girl,
p = 15/27
Probability of choosing boy,
q = 1 - 15/27 = 12/27
[tex]P(X = 1) = \binom{27}{1} { (\frac{15}{27}) }^{1} ( { \frac{12}{27} )}^{26} \\ = 1.045552364 \times {10}^{ - 8} [/tex]
The probability that he will choose a girl will be equal to 15/27.
What is the probability?Probability is defined as the ratio of the number of favourable outcomes to the total number of outcomes in other words the probability is the number that shows the happening of the event.
Probability = Number of favourable outcomes / Number of sample
Given that there are 12 boys and 15 girls in Mr Fraioli’s math class. He will randomly call on one person to answer the problem of the day.
The probability that he will choose a girl,
n = 12 + 15 = 27
Probability of choosing a girl,
p = 15/27
Probability of choosing boy,
q = 1 - 15/27 = 12/27
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