X 1 2 3 4 5

P(X) .32 .39 .17 .08 .04

2. Use the binomial formula to compute the probability of a student getting 7 correct answers on a 10 question Quiz, if the probability of answering any one question correctly is 0.73.

**SHOW YOUR WORK.**

3. Submit your answers to the following binomial questions. You may use the

__appendix table B #5__to answer parts (a) and (b). According to a government study, 15% of all children live in a household that has an income below the poverty level. If a random sample of 20 children is selected:

a) what is the probability that 5 or more live in poverty?

b) what is the probability that 4 live in poverty?

c) what is the expected number (mean) that live in poverty? What is the variance? What is the standard deviation?