The Statistical Abstract of the United States reported that 66% of students who graduated from high school in 2012 enrolled in college. Thirty high school graduates are sampled.

a. What is the probability that exactly 18 of them enroll in college?

b. What is the probability that more than 15 enroll in college?

c. What is the probability that fewer than 12 enroll in college?

d. Would it be unusual if more than 25 of them enroll in college?

e. What is the mean number who enroll in college in a sample of 30 high school graduates?

f. What is the standard deviation of the number who enroll in college in a sample of 30 high school graduates?