NN帮忙指教下 GWD6-24

arthurman

GWD6-24( ps)
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
选择E

michael_wind

包含cheeze和fruit都是一种的话，就是2*6=12种，都包含两种的话，1*6C2=15种。。15+12=27

sbjqbS

排列组合呗 问你要求用同种起司和水果 就是分别用一种的和分别用两种的 C61*C21+C62*C22=27 小弟是准备要考GMAT的 现在刚刚了解GMAT是什么 不过看来数学题真是看的懂 就能做 楼主加油