三色球问题 若有一个口袋放有12个球，其中有3个红的，3个白的和6个黑的，从中任取8个球， 问共 这也是一个可用穷举法求解的问题。 设任取的红球个数为i, 白球...

三色球问题 若有一个口袋放有12个球，其中有3个红的，3个白的和6个黑的，从中任取8个球， 问共 这也是一个可用穷举法求解的问题。 设任取的红球个数为i, 白球个数为 j，则黑球个数为8-i-j，用count统计不同的搭配数目- Three chromospheres questions if have a pocket to put have 12 balls, including 3 red, 3 white and 6 black, no matter what takes 8 balls, asked altogether this also is may use the question which the exhaustion method solves. Supposes no matter what takes the red ball integer is i, the white ball integer is j, then the black ball integer is 8-i-j, counts differently with count matches the number