总述:本次共解1题。其中
☆算术计算1题
〖1/1算式〗
作业:求算式 (C(5,2)*C(38,2)+C(5,3)*C(38,1)+C(5,1)*C(38,3)*1)/C(43,4) 的值.
题型:数学计算
解:
(C(5,2)*C(38,2)+C(5,3)*C(38,1)+C(5,1)*C(38,3)*1)/C(43,4)
=(10*C(38,2)+C(5,3)*C(38,1)+C(5,1)*C(38,3)*1)/C(43,4)
=(10*703+C(5,3)*C(38,1)+C(5,1)*C(38,3)*1)/C(43,4)
=(10*703+10*C(38,1)+C(5,1)*C(38,3)*1)/C(43,4)
=(10*703+10*38+C(5,1)*C(38,3)*1)/C(43,4)
=(10*703+10*38+5*C(38,3)*1)/C(43,4)
=(10*703+10*38+5*8436*1)/C(43,4)
=49590/C(43,4)
=49590/123410
=0.401831 答案:(C(5,2)*C(38,2)+C(5,3)*C(38,1)+C(5,1)*C(38,3)*1)/C(43,4)=0.401831你的问题在这里没有得到解决?请到 热门难题 里面看看吧!