In a survey of college athletes, 84% said they are willing to speak up and be more active in social issues. You randomly select 25 college athletes. Find the probability that the number who are willing to speak up and be more active in social issues is

(a) at least 24,

(b) less than 23, and

(c) between 18 and 22, inclusive.

In Exercises 19–26, determine whether you can use a normal distribution to approximate the binomial distribution.
If you can, use the normal distribution to approximate the indicated probabilities and sketch their graphs. If you cannot, explain why and use a binomial distribution to find the indicated probabilities. Identify any unusual events. Explain.