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Probability

Question:

Interest centers around the nature of an oven purchased at a particular department store. It can either be a gas or electric oven. Consider the decision made by sixdistinct customers.
(a) Suppose that the probability is 0.40 that at most, two of these individuals purchase an electric oven. What is the probability that at least three purchase theelectric oven?
(b) Suppose that it is known that the probability that all six purchase the electric oven is 0.007 while 0.014 is the probability that all six purchase the gas oven.What is the probability that at least one of each type is purchased?

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