??????????? ???????????? ??????????????

?????????С???????

?????

????????????????????????????????????????·????!???????????????????????????μ???????????????????Щ?????????÷??????????棬???????????????????????ü?????????????????????????????????????Щ???????????棬???????????????????????????????棬????????????????????????????11??12?????

???

?????11???????????10???????????????????33???????

???裺

???10??????11;???????????9?????10;????11??????12??

?????

??????????????????????????;?????????????????????????????????Ч;?????????????????????е???????????????????????????????;????????????????????????κ??????????;???÷?Χ??СR??R??????R?????????????ɡ?

????

????????11???????????12???????????????????30%??????65%??!???????30%????20%??????????8%???vip??2%????????????У????30%???????????????????????????????????0.7*0.7*0.7=0.49*0.7???????0.5*0.7=0.35???????????????65%??

?????????????11?????????????????????????30%??????????????????????????????????????????????65%???????ò????????????????65%???????α????Σ???????!????????????′ξ?????11??????????;??????????????????????;???????????????????10??9??????????12??????????????????????????????????????????????11?????л???????!???????????????????????????!???????????????????????????

????

?????????????????С?????????100%?????????黹????????Щ??!????????????11???????!??????????????????????????11????????????10??10????10??9???????10????11??????????10????????????????????????????????????8??9????????????????????????!???????????9??12????????????α4???????????????飬????1????????3??4????????????????????????ɡ??????????????????????????????!(????????13???????!)

???????????