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Source: — Problem Solving |
Junior | Next Rank: 30 Posts
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Re: problem solving

by schowdhary » Sat Mar 28, 2009 1:10 pm
baller12q wrote:If the aveage of the 4 numbers n+2, 2n-3, 4n+1, and 7n+4 is 15 what is the value of N
The answer should be 4.

((n+2)+(2n-3)+(4n+1)+(7n+4))/4 = 15

(n+2)+(2n-3)+(4n+1)+(7n+4) = 60

14n = 60-4

n= 56/14 = 4
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