According to a recent survey, 31 percent of the residents of a certain state who are age 25 years or older have a bachelor’s degree.

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Question: According to a recent survey, 31 percent of the residents of a certain state who are age 25 years or older have a bachelor’s degree. A random sample of 50 residents of the state, age 25 years or older, will be selected. Let the random variable B represent the number in the sample who have a bachelor’s degree. What is the probability that B will equal 40?

The solution, Answer: The probability of getting B=40 is    which is negligible.

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