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9. In a town, 15% of people will vote for Candidate A. I choose 30 people...

9. In a town, 15% of people will vote for Candidate A. I choose 30 people at random.

(a) What is the probability that exactly 15 or exactly 16 people say they will vote for Candidate A?

(b) What is the expected value of the number of people who will say they will vote for Candidate A?

(c) What are the variance and standard deviation of the number of people who will say they will vote for Candidate A?

Math   Statistics-And-Probability   
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