A car dealership claims 20% of their customers are return buyers. Let the random variable X be the number of return buyers in a random sample of 25 recent customers. a./ What is the probability mass function of the number of return buyers selected for analysis? b. ) Find P(1

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A car dealership claims 20% of their customers are return buyers. Let the random variable X be the number
of return buyers in a random sample of 25 recent customers.
a./
What is the probability mass function of the number of return buyers selected for analysis?
b.
) Find P(1<X<5).
C.
) Find the mean and standard deviation of X.
Transcribed Image Text:A car dealership claims 20% of their customers are return buyers. Let the random variable X be the number of return buyers in a random sample of 25 recent customers. a./ What is the probability mass function of the number of return buyers selected for analysis? b. ) Find P(1<X<5). C. ) Find the mean and standard deviation of X.
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