10. Roxana rolls two standard dice. What is the probability of not rolling doubles?

a)

1/6

c)

5/6

b)

1/36

d)

35/36

11. Rui Xin rolls two standard dice. What is the probability getting a sum less than 5?

a)

1/2

c)

1/6

b)

5/6

d)

5/18

15. Ryan asks which of the following pairs of events are dependent?

a) getting two kings in a card game without replacement

b) rolling a 6 on one die; then rolling a 6 on a second die

c) rolling doubles with two dice; then rolling an even sum with two dice

d) dealing a king from a standard deck; spinning a 3 on a spinner

16. Suppose that 4% of the first batch of engines off a new production line have flaws. An inspector named Shuting randomly selects six hundred engines for testing. What is the expected number of flawed engines in the sample?

a)

16

c)

12

b)

24

d)

8

17. In a computerized telephone survey done by Johnny, 44% ofresidents are generally at home to receive a call. If 12 calls are made in an hour, what is the probability that 5 residents are at home to receive the call?

a) 12C5 (0.44)^5 (0.56)^7b) (0.44)^5(0.56)^7c) 12C5(0.44)^5d) 12C5(0.44)^7(0.56)^5

20. If mean = 10, standard deviation = 2, and X = 12 what is the population of scoring lower than this?

a) 0.3413b) 0.1587c) 0.68 d) 0.8413