請問PP1 PS-43

sangchangtw

我剛剛才發現..式子ˋ沒錯 不過計算錯了...

sherry树丛

选D阿，你计算错了

sangchangtw

A certain company employs 6 senior officers and 4 junior officers. If a committee is to be created that is made up of 3 senior officers and 1 junior officer. how many different committees are possible?
(a) 8
(b)24
(c)58
(d)80
(e)210

I calculate by C(6,3)XC(4,1)=60X4=240...
can somebody help me to solve this quiz...><