Question: At a large construction site there are, on average, 9 cement mixer failures per month, which require an expensive re - placement. Assume there are

At a large construction site there are, on average, 9 cement
mixer failures per month, which require an expensive re-
placement. Assume there are 30 days in a month.
(a) What is the probability that the first concrete mixer
failure in a month only occurs after 16 days?
At a large construction site there are, on

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