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a question from CRACK-GMAT, please do me a favor

There were only two candidates in an election, One got 62% votes and was elected by a margin of 144 votes, Assuming, all the voters voted for one of the two candidates , them total number of voters were:

A 500
B 600
C 700
D 800
E 1000

supermht@hotmail.com
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600。
(62%-38%)*X=144
Robert之家-----我的家园

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