GRE(sh)W}Y(ji)
GRE(sh)W}Y(ji)
GRE(sh)W}Y(ji)
1.AB¼ABͬrl(f)ęCʞ0.3AΪl(f)ęCʞ0.5l(f)BęCc0.5ȴС keyAl(f)ĸʞ0.5+0.3=0.8;=0.3=PP=0.8P P=0.3750.5
⣺AΪl(f)ęCʞ0.5ABͬrl(f)rAl(f)ĸʑ(yng)ԓǣAΪl(f)ABͬrl(f)֮ͼP=0.5+0.3=0.8
PP=PP=P/P=0.3/0.8=0.375
2.AF(xin)ĸ0.6 B F(xin) 0.8, A or b or both.F(xin)ĸc 0.92^С
⣺~P=1-0.6=0.4 ~P=1-0.8=0.2 ~ab=0.20.4=0.08 1-0.08=0.92
C.
3.320һŮĸ0.65@ȺŮжĔ(sh)100ȴС
⣺ֻһԴ}ĸ䌍ǰٷֱȣ
Ů˔(sh)320=96 100xB
4. 1100 xɂͬĔ(sh)߽Ԟ 6 ı(sh)ęC?
⣺100ﹲ6ı(sh)Ă(sh)100/6=164t16
GRE(sh)W}Y(ji)P(gun)£
(sh)WӋY(ji)03-19
Д(sh)WcY(ji)03-20
(sh)W̌WY(ji)ʽ03-20
Zij~02-01
Y(ji)õĔ(sh)Wʽʽ04-22
СW(sh)Wķ˼cY(ji)02-26
P(gun)K(lin)(sh)WČWɿY(ji)10-17
һ(sh)W(jng)Y(ji)03-19
СW(sh)W̌WunĿY(ji)09-25
xɢ(sh)Wn̿Y(ji)03-13