P(c) = (1-y)*(1-x) = .45
P(b) = y * (1-x) * y / (1-(1-x)*(1-y)) = .20
P(a) = 1- P(c) - P(b) = .35
Am I missing sth?
• 回复:回复:回复:C H A G E FROM 3) -guest007- ♀ (146 bytes) () 02/06/2010 postreply 17:17:37
• 回复:回复:回复:C H A G E FROM 3) -Jinjing- ♀ (243 bytes) () 02/07/2010 postreply 11:18:41