標題:
f5數學題一問?10點
發問:
there are 10 boxes of wine glasses in a factory,each box contains 20 glasses and only 1 glass in these 10 boxes is defective,a customer randomly chooses 1 box and randomly checks 4 of glasses inside,if he finds no defective glasses,he buys the box of glasses,find probability that customer buys box of glasses 更新: answer:49/50
P(he buys the box of glasses)＝P(he choose a box that has no defective glasses)+ P(he choose the box containing the defective glass and doesn't find the defective glass) ＝9/10+(1/10)(19/20)(18/19)(17/18)(16/17) ＝9/10 +(1/10)(16/20) =9/10+16/200 =(180+16)/200 =186/200 希望幫到你！ 2011-09-24 09:00:21 補充： 對不起，應該是196/200 =49/50
其他解答:
f5數學題一問?10點
發問:
there are 10 boxes of wine glasses in a factory,each box contains 20 glasses and only 1 glass in these 10 boxes is defective,a customer randomly chooses 1 box and randomly checks 4 of glasses inside,if he finds no defective glasses,he buys the box of glasses,find probability that customer buys box of glasses 更新: answer:49/50
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最佳解答:P(he buys the box of glasses)＝P(he choose a box that has no defective glasses)+ P(he choose the box containing the defective glass and doesn't find the defective glass) ＝9/10+(1/10)(19/20)(18/19)(17/18)(16/17) ＝9/10 +(1/10)(16/20) =9/10+16/200 =(180+16)/200 =186/200 希望幫到你！ 2011-09-24 09:00:21 補充： 對不起，應該是196/200 =49/50
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