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## Stats problem!!

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abhinav khanna Rising GMAT Star
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Stats problem!! Sun Apr 15, 2012 7:25 am
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• Lap #[LAPCOUNT] ([LAPTIME])
Hi all,
Can anyone of you guide me on how to find mode in a set with repeating numbers and -ve/+ve numbers. For instance:

Set A, B, and C consist of the following elements:
A {0, 3, 4, 2, 0, 4, 7, 8, 4, 17} B {20, 12, -7, -9, -5, -7, 11, -5, 68} C {-1.5, 0, 1.5}. If Z is
defined as the sum of modes of sets A, B, and C, what is the value of Z?

Thanks

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Birottam Dutta GMAT Destroyer!
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Sun Apr 15, 2012 9:40 am
Mode of a set of numbers is the element in the set which occurs maximum number of times:

In set A, 4 is the mode.
In set B, both -7 and -5 are the modes (It is a bimodal set)
In set C, there is no mode.

Sum of the modes = 4 + (-5) + (-7) = -8.

Hope this is all right!

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