Marijuana use about 17% of all 18- to 25-year-olds are current

Marijuana Use According to theĀ Statistical Abstract of the United States, about 17% of all 18- to 25-year-olds are current marijuana users.

(a) What is the probability that four randomly selected 18- to 25-year-olds are all marijuana users?

(b) What is the probability that among four randomly selected 18- to 25-year-olds at least one is a marijuana user?

b. SAT Reports Shawn is planning for college and takes the SAT test. While registering for the test, he is allowed to select three schools to which his scores will be sent at no cost. If there are 12 colleges he is considering, how many different ways could he fill out the score report form?