R****D 发帖数: 1152 | 1 【 以下文字转载自 Statistics 讨论区 】
发信人: ReMinD (One Shoot,One KILL), 信区: Statistics
标 题: 帮看道基础概率题 有包子
发信站: BBS 未名空间站 (Thu Sep 24 10:19:41 2009, 美东)
involving the number of ways of selecting
n items. For what values of n will the number of ways of selecting n items
from 52 exceed the number of ways of selecting 11 items from a set of 90?
All values of n from( ) through( ),inclusive.
怎么算啊? |
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