Spinning for apples (6.3 or 7.3) In the Ask Marilyn column of Parade magazine, a reader posed
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Spinning for apples (6.3 or 7.3) In the “Ask Marilyn”
column of Parade magazine, a reader posed this question: “Say that a slot machine has five wheels, and each wheel has five symbols: an apple, a grape, a peach, a pear, and a plum. I pull the lever five times. What are the chances that I’ll get at least one apple?” Suppose that the wheels spin independently and that the five symbols are equally likely to appear on each wheel in a given spin.
(a) Find the probability that the slot player gets at least one apple in one pull of the lever. Show your method clearly.
(b) Now answer the reader’s question. Show your method clearly.
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