第四局必然甲队获胜
所以概率为C3 2 * 0.5*0.5*0.5*0.5
所以楼主做的是正确的
概率题:实力相当的甲.乙两队参加乒乓球团体比赛,实行5局3胜,求甲队打完4局获胜的概率
概率题:实力相当的甲.乙两队参加乒乓球团体比赛,实行5局3胜,求甲队打完4局获胜的概率
我写的是3C2*(0.5)^2*0.5*0.
我写的是3C2*(0.5)^2*0.5*0.
数学人气：422 ℃时间：2019-11-08 13:52:13
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