推 geniitwo :1/16 4/16 6/16 1/3 1/27 05/16 20:26
→ nokol :感謝,請問一下您的1/3以及1/27是指第二題中的哪兩題 05/16 20:44
→ ckchi :1/3 和 1/27 是2-(1) (2) 05/17 01:24
→ ckchi :2-(3) : C(7,3)*(1/3)^3*(2/3)^4 05/17 01:25
→ ckchi :2-(4) : 1/2 (因為0次+1次+2次+3次=4次+5次+6次+7次) 05/17 01:27
→ ckchi :oops 更正 2-(4)不對 05/17 01:28
→ ckchi :C(7,0)*(1/3)^0*(2/3)^3 + C(7,1)*(1/3)^1*(2/3)^2 + 05/17 01:33
→ ckchi :C(7,2)*(1/3)^2*(2/3)^1 + C(7,3)*(1/3)^3*(2/3)^0 05/17 01:33
→ nokol :c大,感謝您了,很清楚,謝謝... 05/17 03:37