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by sparsh.21 » Wed Jan 14, 2009 9:20 am
150, 200, 250, n

Which of the following could be the median of the 4 integers listed above?

I. 175
II. 215
III. 235


A. I only
B. II only
C. I and II only
D. II and III only
E. I, II, and III



OA is C

Please explain the answer
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Re: PS-1

by logitech » Wed Jan 14, 2009 10:22 am
If N < 150

N, 150, 200, 250 = median will be 175

For 215 and 235 since they are between 200 and 250

Let's multiply them by 2 and see where they sit respect to 200

215x2 = 430 - 200 = 230

150, 200, 230, 250 - OK

235 x2 = 470 - 200 = 270

150, 200, 250, 270 now since it is bigger than 250, the mean will be 225 for any number that is > 250 so NOT OK!

(C)

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by sparsh.21 » Wed Jan 14, 2009 6:54 pm
Nice Explanation.... Thanks
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