???????????????????????????????
??????????????δ????????2011-05-26 11:50:37
??????????????????????з?????????????????????????????г????????°ɡ????????????????????????????????????????????λ??????????
????????????????佫???????????????????5???
???????????????????????????????????????????????з??Щ??????????????????????￡??????????????????????С???????????????????????????
?????????
??????????120??????30??????222.
????????????132??????24??????178.
?????????????144????????48??????211
???????????????100????
???????????佫??????????????
?????? 100???? ??? ????? 100???? ???????????????132????+132*0.2??5?????????20%????????*0.4?????5?????4????????
????? 24????*100????+178*100=2400+17800=20200
?????? ??132????+132*0.2??*0.4*100=??132????+26??*0.4*100=6320
????????????? 6320??????-2400??????=3920/178=22??С??????????
???????????????????????????????????????????????????
???????±?????????
???????????佫??????????????
?????? 100???? ??? ????? 100???? ???????????????132????+132*0.2??5?????????20%????????*0.4?????5?????4????????
????? 24????*100????+178*100=2400+17800=20200
?????? ??132????+132*0.2??*0.4*100=??132????+26??*0.4*100=6320*2????????=12640
??????????? 12640??????-2400??????=10240/178=57
?????????????????????????????????? ??6320-2400??*2.??????????????Ρ???
???????????????д?ɡ??????????????????????
?????????????????2????????????????????????????????2??????????????
??????????300???????????200????????????????????????????????????????????????????????????
???????????佫??????????????
?????? 300???? ??? ????? 200???? ???????????????132????+132*0.2??5?????????20%????????*0.4?????5?????4????????
????? 24????*200????+178*200=4800+35600=40400
?????? ??132????+132*0.2??*0.4*300=??132????+26??*0.4*300=18960
????????????? 18960??????-4800??????=14160/178=79??С??????????
???????????
??????????10???????????100???????δ?????????????????????????????????????????о???????????
???????????佫??????????????
?????? 10???? ??? ????? 100???? ???????????????132????+132*0.2??5?????????20%????????*0.4?????5?????4????????
????? 24????*100????+178*100=2400+17800=20200
?????? ??132????+132*0.2??*0.4*10=??132????+26??*0.4*10=632
????????????? 632??????-2400??????=???????????????????????????????????????????????????????????????????????????????￡??????????????
???????????????????????????????????????????????????????????????????????????????????????????????????????????????
???????????佫??????????????
?????? 10???? ??? ????? 100???? ???????????????132????+132*0.2??5?????????20%????????*0.4?????5?????4????????
????? 24????*10????+178*100=240+17800=18040 ????????????????10?????????????????10???????????????????????100?????????
?????? ??132????+132*0.2??*0.4*10=??132????+26??*0.4*10=632
????????????? 632??????-240??????=392/178=2??С??????????
??????????t??????????????????????????????
???????:??????????????????40407?????????????40407???????????α? ????
????????????????????????????????????????40407???????40407????????
