A: the area is defined by x=0, y=0, x=60, y=60, y=x-20 and y=x+20.
B: the area is defined by x=0, y=0, x=60, y=60.
The probability = A/B = 5/9.
回复:这解有点杀鸭用牛刀的味道。
所有跟帖:
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回复:回复:这解有点杀鸭用牛刀的味道。
-jinjing-
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04/23/2010 postreply
17:51:46