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At Kirk’s Audio Emporium, 10% of the customers buy an extended warranty for the items. For...

At Kirk’s Audio Emporium, 10% of the customers buy an extended warranty for the items. For a randomly chosen group of 60 customers, let the random variable X = the number of customers who buy an extended warranty.

a) Find P(X=7). What does this number represent?

b) Find P(X<(or equal to)6). What does this number represent?

c) Find P(3 < or equal to X < or equal to 9). What does this number represent?

d) Find μ and P(X=μ). What do these numbers represent?

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