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QUESTION

At an automatic Car wash, cars arrive randomly at a rate of 7 every 30 minutes. The car wash takes exactly 4 minutes (This is Constant).

At an automatic Car wash, cars arrive randomly at a rate of 7 every 30 minutes. The car wash takes exactly 4 minutes (This is Constant). On average, how long would each driver have to wait before receiving service?

A) 28 minutes           B) 32 minutes           C)24 minutes                        D)None of the above

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