Prep PS2-156 156.
16266-!-item-!-187;#058&011027 A certain restaurant offers 6 kinds of cheese and 2 kinds of fruit for its dessert platter. If each dessert platter contains an equal number of kinds of cheese and kinds of fruit, how many different dessert platters could the restaurant offer?
(A) 8 (B) 12 (C) 15 (D) 21 (E) 27
题意不太明白。如果说,甜品盘里面的cheese和frui数量相同,那么,在水果是一种的情况下,排列数量为:P1/6P1/2;再考虑水果是两种的情况,就是P2/6,最后把两个的数量加起来。
但是,这样答案就不对了呀。请NN指教。 |