1/2*1/2 --- for odd numbers
1/9 ---- for 9 which is not prime number
1/4-1/9=5/36
回複:回複:5/36
所有跟帖:
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回複:回複:回複:5/36
-Jinjing-
♀
(78 bytes)
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02/07/2010 postreply
07:52:16
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You are right!
-pj-
♂
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02/08/2010 postreply
14:08:47
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回複:回複:回複:5/36
-wxczcbm-
♂
(160 bytes)
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02/07/2010 postreply
22:20:10
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回複:回複:回複:回複:5/36
-greenfarm-
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02/08/2010 postreply
10:13:27
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you are right. possibility for odd number is wrong
-pj-
♂
(27 bytes)
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02/08/2010 postreply
14:09:53