作者polb (不理不理是我无情)
看板TransPSY
标题[统计] 无耻第二问
时间Thu Dec 3 00:33:16 2009
A gumball dispenser has 38 orange gumball,30 purple ones,and 18 yellow ones.
the dispenser operates such that one quarter delivers 1 gumball.
usind three quarters,what is the probabilly that of the 3 gumballs obtained,
exactly 1 will be purple and 1 will be yellow?
请高手解答 拜托
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1F：→ kent2243:usind这个是什麽 这是考古题吗?? 感觉是用相乘律QQ... 12/03 17:49
2F：→ polb:抱歉 手残 应该是using 12/03 19:49
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4F：→ polb:understanding statistics in the behavioral sciences 12/03 22:57
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