
a. "Chocolate" and "Adults" (whatever those mean) will be independent as long as

"Chocolate" has the marginal distribution given by the second column, with a total probability of

. Similarly, "Adults" has the marginal distribution described by the third row, so that

. Then

Meanwhile, the joint probability of "Chocolate" and "Adults" is given by the cell in the corresponding row/column, with

.
The probabilities match, so these events are indeed independent.
Parts (b) and (c) are checked similarly.
b. Yes;


c. Yes;

Answer:
21 quarters = 5.25
15 nickel. = .75
Step-by-step explanation:
21 + 15 = 36
5.25 + .75 = 6.00
Your answer is gonna be <u><em>B.</em></u>
Brainliest plz. 7/10 brainliest answers till i level up
Answer:
Angle A = 40
Angle B = 60
Angle C = 80
Step-by-step explanation:
The three angles of a triangle are in the ratio
2:3:4
Multiply by x
2x:3x:4x
The sum of the angles is 180 degrees
2x+3x+4x = 180
9x = 180
Divide by 9
9x/9 = 180/9
x = 20
The value of x is 20
A B C
2*20:3*20:4*20
40 60 80
Angle A = 40
Angle B = 60
Angle C = 80
Answer:
3(2^3+({4}/{2}^3-(6-3)^2)=21