integers

The sum of the first 50 positive even integers is 2,550. What is the sum of the even integers from 102 to 200, inclusive?

a)5,100
b)7,550
c)10,100
d)15,500
e)20,100

answer is B

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chetanojha: Master | Next Rank: 500 Posts; Posts: 125; Joined: Sun Sep 16, 2007 1:38 pm; Thanked: 6 times

by chetanojha » Sat Sep 05, 2009 1:23 pm

find below

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praky_rules: Senior | Next Rank: 100 Posts; Posts: 45; Joined: Wed Jun 11, 2008 4:25 pm; Thanked: 4 times; GMAT Score:730

by praky_rules » Wed Sep 09, 2009 4:47 pm

102=2+100
104=4+100
.
.
.
200=100+100

Sum both sides =>ans = 2550+50*(100)=7550

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