???mt????????????? ????????÷???

???mt??????????,???mt?????????,???mt????????

?????

1???????????????18%???????????82%?????????????????????????18%??????????????????????1-5?????????????6???????????8%?????????????????6??????? 6*9=54,?????????????=6?????????---????????????????=?6?????6*8%=0.48,????9?Σ????? 0.48*9=4.32???????????????????????54-4.32=49.68.

?????(???鷳)

1??????????

??????????18%??9?η????????????????9???????????

18%^9*9

?????ε??????18%??9?η?????82%????10?????????10??????????????

18%^9*82%*10*10

……

???n??…… ?????????18%^9*82%^n*C(9,9+n)*(9+n)

????????????????????????????????50??????????

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

????6????????????????????????????????????(??????????)?????????5???????

???????mt4.2?°汾???????????????

???????mt4.2??????????

???????mt?3??????????????

???????mt???????????

???????mt????????1-15???????λ??????

?????????????40407???mt???http://austindefensivedrivingonline.com/mt/