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1.The probability that a residential home in a high cost area requires roofing repairs is 0.25. If 20 homes are random selected from this area,

1.The probability that a residential home in a high cost area requires roofing repairs is 0.25.

If 20 homes are random selected from this area, what is the probability that between 4 (inclusive) and 6 (inclusive) homes will require roofing repairs. Find the expected number of homes requiring roofing repairs.

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