OG12th DS 152

meckychen · 发表于 2010-2-11 16:52:56

If Carmen had 12 more tapes, she would have twice as many tapes as Rafael. Does Carmen have fewer tapes than Rafael?
1. Refael has more than 5 tapes.
2. Carmen has fewer than 12 tapes.
Ans is B
Why not E
thank you.

jeannefq · 发表于 2010-2-11 17:15:21

carmen有X，rafael有Y。X+12=2Y,Y=X/2+6
条件一：Y>5，无法确定X和Y大小
条件二：X<12，Y必定大于X。因为从X+12=2Y中我们就可以知道，倘若X<12，那么Y就会依靠大于X的12来提高数值大小～～这么说不知道有没有说明白...

meckychen · 发表于 2010-2-11 22:13:36

thank you

OG12th DS 152

所属分类: GMAT考试

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