[問題] 簡單機率
X為中心為150,標準差為42之常態分配
問同時取9個大於1800的機率?
求方法@@
原題目在這
an elevator carries nine people in a load ,the weights of people vary
accordind
to many factors buy may be decribed by a distribuion with mean 150 pounds and
standard deviation 42 pounds. over many loads,each of nine people,about what
percentage of loads will exceed the safe load limit of 1800 pounds?
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