Please check the image for the question
A  3
B  4
C  5
D  6
E  7
OA C
This problem was a little hard to search in the search engine as it contains a table. If some has a link to this solution please provide the link or solution
Thanks
What is m+n ??
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 sanju09
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Well, following is the necessary info drawn from the table:
x + 4 = 1 or x = 3
y + 4 = 5 or y = 9
z + 4 = m
x + e = 7 or e = 10
y + e = n or n = 1
z + e = 10 or z = 0, hence m = 4
m + n = [spoiler]4 + 1 = 5
C[/spoiler]
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Sanjeev K Saxena
Quantitative Instructor
The Princeton Review  Manya Abroad
Lucknow226001
www.manyagroup.com
here's how I went about it.. Noted all the equations possible:
4+x=1
4+y=1
4+z=m
e+x=7
e+y=n
e+z=10
f+x=2
f+y=4
f+z=5
Isolated the eqns which have m or n 
4+z=m
e+y=n
Adding both 
4+z+e+y = m+n, our requirement.
one eqn from the above set states
e+z=10
So,
4+10+y = m+n
Isolating the eqn which has a single y,
4+y=5
y = 9
Substituting,
4+10+(9) = m+n = 5 Hence C.
4+x=1
4+y=1
4+z=m
e+x=7
e+y=n
e+z=10
f+x=2
f+y=4
f+z=5
Isolated the eqns which have m or n 
4+z=m
e+y=n
Adding both 
4+z+e+y = m+n, our requirement.
one eqn from the above set states
e+z=10
So,
4+10+y = m+n
Isolating the eqn which has a single y,
4+y=5
y = 9
Substituting,
4+10+(9) = m+n = 5 Hence C.

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Congrats bhai..Got ur hals TON Thanks!!sanju09 wrote:Well, following is the necessary info drawn from the table:
x + 4 = 1 or x = 3
y + 4 = 5 or y = 9
z + 4 = m
x + e = 7 or e = 10
y + e = n or n = 1
z + e = 10 or z = 0, hence m = 4
m + n = [spoiler]4 + 1 = 5
C[/spoiler]
Hurray Party!!!!!!!!!!1