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31 October, 09:28

Consider the type of clothes dryer (gas or electric) purchased by each of five customers at a certain store. A. If the probability that at most one of these purchases an electric dryer is 0.428 what is the probability that at least two purchase an electric dryer?

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  1. 31 October, 10:56
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    Let event E = the event that at most one customer purchases an electric dryer (1 or 0 customer). Then E' is the event that at least two purchase electric dryers (2 or 3 or 4 or all 5 purchase an electric dryer) P (E′) = 1 - P (E) = 1 -.428 =.572
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