又一道prepare数学题。。。

甜心俏女巫 · 发表于 2010-3-11 20:46:02

A certain office supply store stocks 2 sizes of self-stick notepads, each in 4 colors:blue, green, yellow, or pink. The store packs the notepads in packages that contain either 3 notepads of the same size and the same color or 3 notepads of the same size and of 3 different colors. If the order in which the colors are packed is not considered, how many different packages of the types described above are possible?
A 6 B 8 C 16 D 24 E 32
麻烦各位大牛啦。。。谢谢

jeffjarrett · 发表于 2010-3-11 21:14:28

1：same size，same color，因为有2种sizes，4种colors，所以有2x4=8种可能。

2：同理- -，same size，不同color，非蓝，非绿，非黄，非粉，4种colors，加上2种sizes，也有2x4=8种可能。

所以应该是8+8=16

又一道prepare数学题。。。

所属分类: GMAT考试

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