What is the probability that the two customers in front of


Question: The time to service customers at a bank teller's drive-through window is exponentially distributed with a mean of 50 seconds.

What is the probability that the two customers in front of an arriving customer will each take less than 60 seconds to complete their transactions?

What is the probability that the two customers in front will finish their transactions so that an arriving customer can reach the teller's window within 2 minutes?

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Basic Statistics: What is the probability that the two customers in front of
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