[計量] 一題PS練習題
在facebook上有加入一個gmat group
最近發的一道數學練習題 還沒公佈答案
我猜是(C)180 用5*3*2*3!亂推的
可是滿多人猜(B)的
大家有興趣算算看嗎? XD
Six three-female-representative delegations attend an international GMAT
conference sponsored by The 800 Test Academy. The representatives give a
double kiss on a cheek when they are introduced to one another.
How many kisses on a cheek are possible if each delegate gives a double kiss
on a cheek only once with every other attendent except with those of her
delegation?
(A)766
(B)270
(C)180
(D)144
(E) 72
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