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A local bank branch employs three tellers who can each help a customer on average in 7 minutes, with a standard deviation of 4.4 minutes.

A local bank branch employs three tellers who can each help a customer on average in 7 minutes, with a standard deviation of 4.4 minutes. On average, 24 customers arrive at this bank per hour (in a random fashion). How long would customers have to wait if we do not pool the employees? Write down your answer in minutes with 1 decimal.

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