A certain office supply store stocks 2sizes of self-stick notepads, each in 4 colors: Blue, Green, Yellow Or Pink. Thestore packs the notepads in packages that contain either 3 notepads of the samesize and the same color or 3 notepads of the same size and of 3 differentcolors. If the order in which the colors are packed is not considered, how manydifferent packages of the types described above are possible?
加粗的部分我的理解跟正确答案差好多...
求NN帮助~~T.T
还有数学DS题里,什么样的问法 是问“是否能够判断问题能否成立”
什么样的问法是问”能否大于XX数“
表达得不太清楚,希望NN们能够看懂并解惑T.T 感激不尽!!!!
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