作者polb (不理不理是我無情)
看板TransPSY
標題[統計] 無恥第二問
時間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?
請高手解答 拜託
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1F：→ kent2243:usind這個是什麼 這是考古題嗎?? 感覺是用相乘律QQ... 12/03 17:49
2F：→ polb:抱歉 手殘 應該是using 12/03 19:49
3F：→ kent2243:可以告訴我考題出處嗎 想直接看比較清楚..... 12/03 22:35
4F：→ polb:understanding statistics in the behavioral sciences 12/03 22:57
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