Question: Suppose that a certain examination is to be taken by five students independently of one another, and the number of minutes required by any particular

Suppose that a certain examination is to be taken by five students independently of one another, and the number of minutes required by any particular student to complete the examination has the exponential distribution for which the mean is 80. Suppose that the examination begins at 9:00 a.m. Determine the probability that at least one of the students will complete the examination before 9:40 a.m.

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