What is the value of x + y?
1) mx + ny + xn + ym = 10
2) m + n = 6
1) mx + ny + xn + ym = 10
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Statement 1 is sufficient. |
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Statement 1 is insufficient. |
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Calculation is necessary. |
Countinue
The question stem asks for the value of x + y, so we don’t
necessarily need to know the values of x and y independently.
We need to know only what their sum is. But the equation in this statement
has four variables, including x and y, so there’s no way
we could get rid of m and n and be left with a numerical
value as the sum of x and y. This is insufficient.
Now let’s look at the second statement.
Countinue
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