Suppose65%of customers at a large retail store are repeat customers.

A random sample of31customers is selected.

Assuming independence, use the binomial formula or software (recommended) to answer the following questions.

Report probabilities accurate toat least 4decimal places.

What is the probability that, of the31customers selected:

a)exactly 20are repeat customers?

b)exactly 9are notrepeat customers?

c)allof them are repeat customers?

d)no less than 18are repeat customers?

e)no more than 20are repeat customers?

f)at least 18andat most 20are repeat customers?

g)more than halfare repeat customers?