Mathematics & Statistics
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機率
答案是0.3946求過程
6.45 At a train reservation counter, one man com-
pletes his reservation with a mean time of 3 minutes.
Service completion time is assumed to follow exponen-
tial distribution. Out of the 5 customers in queue,
what is the probability that at least 4 will complete
their reservation within 3 minutes?
t
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