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DS question

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Source: — Data Sufficiency |

by Anurag@Gurome » Tue Feb 14, 2012 8:02 pm
HG10 wrote:What is the value of 1/m + 1/n?

1. m = 5
2. (m+n)/(mn) = 7/10

Answer= B
(1) m = 5 but nothing is given about n; NOT sufficient.

(2) (m + n)/(mn) = 7/10 implies 1/n + 1/m = 7/10; SUFFICIENT.

The correct answer is B.
Anurag Mairal, Ph.D., MBA
GMAT Expert, Admissions and Career Guidance
Gurome, Inc.
1-800-566-4043 (USA)

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by [email protected] » Wed Feb 15, 2012 5:24 am
What is the value of 1/m + 1/n?

1. m = 5
2. (m+n)/(mn) = 7/10


The OA is B no doubt about it...

Explanation:

when you solve the equation 1/m + 1/n you get (m+n)/mn as the equation i.e after taking the LCM
IT IS TIME TO BEAT THE GMAT

LEARNING, APPLICATION AND TIMING IS THE FACT OF GMAT AND LIFE AS WELL... KEEP PLAYING!!!

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by [email protected] » Wed Feb 15, 2012 5:24 am
What is the value of 1/m + 1/n?

1. m = 5
2. (m+n)/(mn) = 7/10


The OA is B no doubt about it...

Explanation:

when you solve the equation 1/m + 1/n you get (m+n)/mn as the equation i.e after taking the LCM
IT IS TIME TO BEAT THE GMAT

LEARNING, APPLICATION AND TIMING IS THE FACT OF GMAT AND LIFE AS WELL... KEEP PLAYING!!!

Whenever you feel that my post really helped you to learn something new, please press on the 'THANK' button.
Join the discussion

by Troika » Wed Feb 15, 2012 6:12 am
Anurag and Amit, thank you for the explanations!
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