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Median daily electricity - GMAT Prep

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Median daily electricity - GMAT Prep

by singalong » Sat May 28, 2011 4:44 am
For the 5 days shown in the graph, how many kilowatt-hours greater was the median daily electricity use than the average (arithmetic mean) daily electricity use?

a)1

b)2

c)3

d)4

e)5

How is the answer a? I am sure I am missing something silly here. OA is c.
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by cans » Sat May 28, 2011 4:59 am
IMO A
Mean = 26
Median - arrange all numbers in ascending order - 19, 24, 27, 29, 31
and thus median is 27
median - mean =1
Hence A.
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by itsmebharat » Sat May 28, 2011 5:02 am
IMO A
I am not an Expert, please feel free to suggest if there is an error.
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by singalong » Sat May 28, 2011 5:17 am
How stupid of me?I didn't even arrange the numbers in haste *embarased*.

Thank guys.
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