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Source: — Problem Solving |
Junior | Next Rank: 30 Posts
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Joined: Tue May 05, 2009 11:03 am

by vitaly » Fri May 08, 2009 8:39 am
f(1/100)+f(99/100)=10
f(2/100)+f(98/100)=10
...

Also since f(50/100)+f(50/100)=10, then f(50/100)=5

=> 10*(99-1)/2+5 = 495 => B
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