2.5

0.1667

1.45

1

Cannot be determined

Y has a binomial distribution with n = 10 observations and probability of success p = 0.25

Y has a binomial distribution with n = 10 observations and probability of success p = 0.25, provided the deck is shuffled well.

Y has a binomial distribution with n = 10 observations and probability of success p = 0.25, provided that after selecting a card it is replaced in the deck and the deck is shuffled well before the next card is selected.

Y has a geometric distribution with n = 10 observations and probability of success p = 0.25

Y has a geometric distribution with n = 52 observations and probability of success p = 0.25.

1.32

1.7475

2.5

0.09

2.9575

0.10

0.15

0.20

0.25

0.75

 $\sigma_x+\sigma_y$  

 $\left(\sigma_x\right)^2+\left(\sigma_y\right)^2$  

 $\sigma_x+\sigma_y$  , but only if X and Y are independent

 $\left(\sigma_x\right)^2+\left(\sigma_y\right)^2$  , but only if X and Y are independent

None of these

$\mu=1.62\ ;\ \sigma\ =\ 1.414$

$\mu=1.62\ ;\ \sigma\ =\ 1.265$

$\mu=16.2\ ;\ \sigma\ =\ 1.62$

$\mu=16.2\ ;\ \sigma\ =\ 1.273$

$\mu=16.2\ ;\ \sigma\ =\ 4.025$

$145

$585

$865

$635

$485

$144

$216

$255

$30

$360

The number of phone calls received in a one-hour period.

The number of times I have to roll a six-sided die to get two 5s

The number of digits I will read beginning at a randomly selected starting point in a table of random digits until I find a 7.

The number of 7s in a row of 40 random digits.

All four of the above are geometric random variables.