每场比赛的胜利为52%,3局2胜可晋级.请问晋级的概率为?
问题描述:
每场比赛的胜利为52%,3局2胜可晋级.请问晋级的概率为?
答
晋级的概率为
(52%)^3+C(3,2)*(52%)^2*(1-52%)*52%+C(4,2)*(52%)^2*(1-52%)^2*52%
=0.52^3*(1+3*0.48+6*0.48^2)
=0.140608*3.8224
=0.5374600192
≈0.54