appliance store sells 9 refrigerators each week. 45% of all purchasers of a refrigerator buy an extended warranty. Let X denote the number of the next 9 purchasers who do so. What is the probability that at most 2 of them will buy an extended warranty? (Rounded to 4 decimal places)Answer a) What is the expected number of customers that will buy an extended warranty? (Rounded to 1 decimal place) b) What is the variance of the distribution? (Rounded to 1 decimal place)Answer c) What is the standard deviation of the distribution? (Rounded to 1 decimal

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