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you need to think harder

guest007 2010-01-25 09:48:27 ( reads)

please think harder-
15 x 0.2 = 3
15 x 0.8 = 12

85 x 0.2 = 17
85 x 0.8 = 68

12 out of 12+17 ~= 41%

跟帖(1)

jinjing

2010-01-26 10:14:48

回复:you need to think harder