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# PETER , PAUL AND MARY EACH RECEIVED A PASSING SCORE ON HIS /

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Joined: 05 Jul 2006
Posts: 1516
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Kudos [?]: 127 [1] , given: 39

PETER , PAUL AND MARY EACH RECEIVED A PASSING SCORE ON HIS / [#permalink]  15 Aug 2009, 13:56
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PETER , PAUL AND MARY EACH RECEIVED A PASSING SCORE ON HIS / HER HISTORY MIDTERM. THE ARITHMETIC MEAN OF THE THREE SCORES WAS 78. WHAT WAS THE MEDIAN OF THE THREE SCORE.

1. PETER SCORED A 73 ON THIS EXAM
2. MARRY SCORED A 78 ON HER EXAM
CEO
Joined: 17 Nov 2007
Posts: 3574
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 414

Kudos [?]: 2245 [0], given: 359

Re: good statistics [#permalink]  15 Aug 2009, 20:21
Expert's post
B

1) {73, 80, 81} and {73, 79, 82} both have a mean 78 but different median.

2) Marry's score equals to mean. So, to get 78 as a mean, scores of Peter and Paul must be equal to 78 or one be higher and other be lower. In both cases, 78 is a median. So, sufficient.
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Re: good statistics   [#permalink] 15 Aug 2009, 20:21
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# PETER , PAUL AND MARY EACH RECEIVED A PASSING SCORE ON HIS /

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