There are 4 black marbles and 4 white white marbles in a bag. 2 points will be awarded if a black marble is drawn and 1 point will be awarded if a white marble is drawn .If four marble is drawn,find the number of ways to obtain at least 6 points.
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Permutation and Combination
2011-03-07 6:46 am
回答 (1)
2011-03-08 5:42 am
收錄日期: 2021-04-23 23:27:12
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https://hk.answers.yahoo.com/question/index?qid=20110306000051KK01702