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In the addition table shown above, what is the value of m +

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by rajeet123 » Tue Jun 11, 2019 9:16 am
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+ x y z
4 1 -5 m
e 7 n 10
f 2 -4 5

In the addition table shown above, what is the value of m + n =?

A. -19
B. 4
C. 5
D. 6
E. 22
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by rajeet123 » Tue Jun 11, 2019 9:18 am
The sum of some value from the first row and and some value from the first column is given in the intersection box of these values.

So:

x+4=1 --> x=-3;
y+4=-5 --> y=-9;
x+e=-3+e=7 --> e=10;
y+e=-9+10=n --> n=1;
z+e=z+10=10 --> z=0;
z+4=0+4=m --> m=4;

m+n=4+1=5m+n=4+1=5.

Answer: C.
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by Scott@TargetTestPrep » Fri Jun 14, 2019 8:25 am
rajeet123 wrote:+ x y z
4 1 -5 m
e 7 n 10
f 2 -4 5

In the addition table shown above, what is the value of m + n =?

A. -19
B. 4
C. 5
D. 6
E. 22
We need to find the value of m + n. Observe that according to the table, 4 + z = m and e + y = n; so we actually need to determine the value of 4 + z + e + y. Let us re-write this summation as 4 + y + e + z. Now, referring to the table, we observe that 4 + y = -5 and e + z = 10. So, m + n = 4 + y + e + z = -5 + 10 = 5.

Answer: C

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