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题库解析   >   比率、比例与百分比题型   >   DS351-380
    本题由chris提供
178次学习
DS351-380

【OG20-P290-418题】

Is the number of members of Club X greater than the number of members of Club Y ?

(1) Of the members of Club X, 20 percent are also members of Club Y.

(2) Of the members of Club Y, 30 percent are also members of Club X.


    <p>A.&nbsp;Statement&nbsp;(1)&nbsp;ALONE&nbsp;is&nbsp;sufficient,&nbsp;but&nbsp;statement&nbsp;(2)&nbsp;alone&nbsp;is&nbsp;not&nbsp;sufficient.</p><p>B.&nbsp;Statement&nbsp;(2)&nbsp;ALONE&nbsp;is&nbsp;sufficient,&nbsp;but&nbsp;statement&nbsp;(1)&nbsp;alone&nbsp;is&nbsp;not&nbsp;sufficient.</p><p>C.&nbsp;BOTH&nbsp;statements&nbsp;TOGETHER&nbsp;are&nbsp;sufficient,&nbsp;but&nbsp;NEITHER&nbsp;statement&nbsp;ALONE&nbsp;is&nbsp;sufficient.</p><p>D.&nbsp;EACH&nbsp;statement&nbsp;ALONE&nbsp;is&nbsp;sufficient.</p><p>E.&nbsp;Statements&nbsp;(1)&nbsp;and&nbsp;(2)&nbsp;TOGETHER&nbsp;are&nbsp;NOT&nbsp;sufficient.</p><p><br></p>
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答案:
C
Question stem i
s straightforward. Let total number of members of Club X be X, and similarly Y for Club Y. Those who are members of both X and Y = XY (Just XY, not X*Y!) Statement 1: XY = 20% of X Say X = 100 XY = 20 Nothing to be said of the members in Y. Insufficient. Statement 2: XY = 30% of Y Say Y = 100 XY = 30 Nothing to be said of the members in X. Insufficient. Both statements together: XY = 20% of X = 30% of Y This essentially means X > Y Sufficient. Pick C

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