Question

有六道题,由于粗心随机犯了4处不同错误,求概率

Answer 1

1. C(1,6)/[C(1.6)+C(2.6)+C(3.6)+C(4.6)]

2.C(4.6)/[C(1.6)+C(2.6)+C(3.6)+C(4.6)]

3.1-C(4.6)/[C(1.6)+C(2.6)+C(3.6)+C(4.6)]