Question

The probability that an individual has 20-20 vision is 0.2. In a class of 12 students, find each of the following probabilities: a. The probability of finding exactly five people with 20-20 vision? b. The probability of finding less than three people with 20-20 vision? c. The probability of finding at least seven people with 20-20 vision?

Answer 1

This is a binomial distribution question with

n = 12

p = 0.2

q = 1 - p = 0.8

where

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