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AP series

Submitted by iluvindia on Wed, 2008-12-17 23:58

There is a series of 2n + 1 terms that are in Arithmetic Progression. The average of the first (2n-1) terms is 12. The average of the first 2n terms is 15. The sum of all the terms of the series is
a.    30n + 15
b.    36n + 18
c.    24n + 12
d.    Data insufficient

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Posted on: Thu, 2008-12-18 22:27 #1
Question is simple oneans is

Question is simple one

ans is 36n+18

__________________

n/a

Posted on: Wed, 2009-06-03 13:46 #2
simple one

36n+18

Posted on: Wed, 2009-06-03 13:47 #3
simple!!!!!!!!!

36n+18

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