MATH PROBABILITY

Question

According to the Department of Education 80% of students take a mathematics course while in college. Suppose 5 recent college students are selected at random. What is the probability at least one did not take a math course while in college?

Answer 1

80% take math courses

a sample of 5 will have at least one did not take a math course. What's the probability?

Pr(at least one with no math) = 1 - Pr(all math courses)

= 1 - (.8)^5 = 1-.3278 = .67232 = 67.232 %