問題詳情

214. A certain town experiences an average of 5 tornadoes in any four year period. The
number of years from now until the town experiences its next tornado as well as the
number of years between tornados have identical exponential distributions and all such
times are mutually independent


Calculate the median number of years from now until the town experiences its next
tornado.
(A) 0.55
(B) 0.73
(C) 0.80
(D) 0.87
(E) 1.25

參考答案

答案：A

統計：A:0,B:0,C:0,D:0,E:0

難度：計算中