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Interval of Scores

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by gmatblood » Wed Nov 02, 2011 3:44 am
Score Number Interval of Scores
50-59 2
60-69 10
70-79 16
80-89 27
90-99 18

The table above shows the distribution of test scores for a group of management trainees. Which score interval contains the median of the 73 scores?

A. 60-69
B. 70-79
C. 80-89
D. 90-99
E. cannot be determined
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by user123321 » Wed Nov 02, 2011 3:52 am
gmatblood wrote:Score Number Interval of Scores
50-59 2
60-69 10
70-79 16
80-89 27
90-99 18

The table above shows the distribution of test scores for a group of management trainees. Which score interval contains the median of the 73 scores?

A. 60-69
B. 70-79
C. 80-89
D. 90-99
E. cannot be determined
since median is middle number, when all numbers are arranged in increasing or decreasing order, here we need to into which range 37th number falls.

clearly from table it falls in 80-89 range.

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by Anurag@Gurome » Wed Nov 02, 2011 4:42 am
gmatblood wrote:Score Number Interval of Scores
50-59 2
60-69 10
70-79 16
80-89 27
90-99 18

The table above shows the distribution of test scores for a group of management trainees. Which score interval contains the median of the 73 scores?

A. 60-69
B. 70-79
C. 80-89
D. 90-99
E. cannot be determined

Median of 73 scores must be the 37th score when all the scores are arranged in increasing or decreasing order. In the score interval 50-79 there are (2 + 10 + 16) = 28 scores. Hence the 37-th score is not in this interval.

But in the score interval 50-89 there are (2 + 10 + 16 + 27) = 55 scores. Hence the 37-th score is in the score interval 80-89.

The correct answer is C.
Anurag Mairal, Ph.D., MBA
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by vaibhavgupta » Wed Nov 02, 2011 1:23 pm
gmatblood wrote:Score Number Interval of Scores
50-59 2
60-69 10
70-79 16
80-89 27
90-99 18

The table above shows the distribution of test scores for a group of management trainees. Which score interval contains the median of the 73 scores?

A. 60-69
B. 70-79
C. 80-89
D. 90-99
E. cannot be determined
C it its!
If OA is A, IMO B
If OA is B, IMO C
If OA is C, IMO D
If OA is D, IMO E
If OA is E, IMO A

FML!! :/
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