Question

Fifteen percent of all students at a large university are absent on Mondays. If a random sample of 12 names is called on a Monday, what is the probability that all students are present?

Answer 1

The probability of not being absent is 1 - 0.15 = 0.85. Next, use the Binomial distribution ...

Explanation:

Using the Binomial distribution ..

P(all 12 students not absent) `=(0.85)^12~~0.142`

Hope that helped