发布网友 发布时间:2023-07-15 09:35
共4个回答
热心网友 时间:2024-11-22 15:01
C2/4*0.98*0.98*0.02*0.02=6*0.98*0.98*0.02*0.02 =0.00230496热心网友 时间:2024-11-22 15:01
答案是=12*0.98*0.98*0.02*0.02热心网友 时间:2024-11-22 15:01
C2/4*0.98*0.98*0.02*0.02=6*0.98*0.98*0.02*0.02热心网友 时间:2024-11-22 15:02
C(4,2)*98%^2=0.160066667