演變3:任取(不分次序)k個不同的小於等於N的正整數,求其和為M的概率?
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• 任取(不分次序)k個不同的小於等於N的正整數的取法有C(N,k)種,求其和為M的取法有多少種? -皆兄弟也- ♂ (0 bytes) () 06/11/2010 postreply 09:43:25
• 任取(不分次序)k個不同的小於等於N的正整數的取法有C(N,k)種,求其和為M的取法有多少種? -皆兄弟也- ♂ (0 bytes) () 06/11/2010 postreply 09:43:25
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