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Is - 25 + 19 + n = s ?

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Source: — Data Sufficiency |

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by Jay@ManhattanReview » Tue Oct 24, 2017 9:34 pm
VJesus12 wrote:Is - 25 + 19 + n = s ?

(1) s = 2
(2) n/s = 4

The OA is C.

Experts, how can I use both statements to get a conclusion?
(1) s = 2

We do not know the value n. Insufficient.

(2) n/s = 4

We do not know the absolute values of n and s. Insufficient.

(1) and (2) together:

Since s =2 and n/s =4, we have n = 8.

Thus, -25 + 19 + n = s => -25 + 19 +8 = 2 = s. The answer is Yes. Sufficient.

The correct answer: C

Hope this helps!

-Jay

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