Re: [計量] If a bowl contains seven marbles ...

看板GRE (GRE入學考試)作者 (通體舒暢)時間17年前 (2008/10/13 23:39), 編輯推噓0(000)
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※ 引述《ELASTOMER (惡性循環........)》之銘言: : 題目是 : If a bowl contains seven marbles, three red and four : green, four marbles are drawn from the bowl at random : without replacement. What is the propability that contains : two red marbles and two green ones? : 答案是18/35 不知要怎麼解,麻煩各位幫我解答一下,謝謝 C(3,2) x C(4,2) _____________________ C(7,4) -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.109.19.239
文章代碼(AID): #18ysl6_D (GRE)
文章代碼(AID): #18ysl6_D (GRE)