According to the USA Snapshot “Knowing drug addicts,” 45% of Americans know somebody who became addicted to a drug other than alcohol.

Assuming this to be true, what is the probability of the following:

a. Exactly 3 people of a random sample of 5 know someone who became addicted. Calculate the value.

b. Exactly 7 people of a random sample of 15 know someone who became addicted. Estimate using Table 2 in Appendix B.

c. At least 7 people of a random sample of 15 know someone who became addicted. Estimate using Table 2.

d. No more than 7 people of a random sample of 15 know someone who became addicted. Estimate using Table 2.