不好意思
考題我做個更正
更正如下
7.If we pick 10 telephone numbers at random from a telephone book and record
the last digit of the numbers , what is the probability that we obtain
each of the integers from 0 to 9 once only?
請問該怎麼算
8.Find the mean and variance of a continuouus random variable distributed
uniformly over [a,b] with a<b
這一題是要推導囉... 不然這兩個特徵值都是有背的(推導沒問題了)
另外請問大家猜測週日會考哪一類的題目
謝謝
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※ 編輯: dohard 來自: 140.112.7.59 (02/25 17:31)