1、 2011620126112wsm1220-381230112123808958015978025938089/380=0.765()(580159)/580=0.725()(780259)/780=0.6670.765+0.725+0.655/3=0.72()21231220-38123242512 388119588t209888 t3393 18 30%38 30%68 25%98 15%18*30%+38*30%+68*25%+98*15%=48.5388/(388+119+48.5)=0.698()588/(588+209+48.5)=0.695()888/(888+339+48.5
2、)=0.6960.698+0.695+0.696/3=0.696()32426996991995 20-38 : 3739:6-20-38:41:7 20-38 : 201142953 :18.82588: :8 20-38 : 201162325 :15002002logo :9 2038 20118232011910 1558820268820010 20-38 : 2011101107 :1814 111wsm2wsm1220-381224252612330139500t239700 t398330/(330+139)=0.7()500/(500+239)=0.67()700/(700+398)=0.6370.7+0.67+0.64/3=0.67()- vip15%20% - 15%20% - - - - - 3 2 -3 - elandonly-?- -/-2 15%85%99100101993 -5 -6 500g9.30450g7 -ef1688-1. 2. 3. 4. -5. -1. :-2. :3. :-4. :5. :x1. :2. :3. :
