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iamba
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Set X has 5 numbers, thier average is greater than their 17 Jun 2007, 13:42
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Set X has 5 numbers, thier average is greater than their median. Set Y has 7 numbers, their average is greater than their median also. If the 2 sets have no common number and are combined to a new set, is the average of the new set greater than its median?
1) The average of Y is greater than the average of X
2) The median of Y is greater than the median of X



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KillerSquirrel
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Set X has 5 numbers, thier average is greater than their 17 Jun 2007, 13:44
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the answer is (E)

:-D
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iamba
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Set X has 5 numbers, thier average is greater than their 17 Jun 2007, 13:57
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Can you explain the approach?
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KillerSquirrel
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Set X has 5 numbers, thier average is greater than their 17 Jun 2007, 14:16
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yes sure :-D

the following explanation is not my own - but still a very good one:

If average of Y > X then we can't say nething abt their medians
If median of Y > X then we can't say nething abt their averages

If both average and median of Y > X then

example 1::
X:: 1 1 1 1 2
Y:: 3 3 3 3 4 4 4

New Set = 1 1 1 1 2 3 3 3 3 4 4 4
median = 3
average = 30/12 = 2.5
average median

Hence E.

:-D



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