Hi dkumar2012,

This question is based completely on 'Average Formula' rules. If you're comfortable with the math involved, then you'll likely find it easiest to take an Algebraic approach to solving it.

We're told that the average of 7 numbers is 12.2

(Sum of numbers)/7 = 12.2

Sum of numbers = (12.2)(7) = 85.4

Next, we're told that the sum of 4 (of the 7) numbers is 42.8

From this information, we can calculate the sum of the OTHER 3 numbers:

85.4 - 42.8 = 42.6

The question asks for the AVERAGE of the OTHER 3 numbers....

42.6/3 = 14.2

Final Answer:

GMAT assassins aren't born, they're made,

Rich

_________________

760+: Learn What GMAT Assassins Do to Score at the Highest Levels

Contact Rich at: Rich.C@empowergmat.com

# Rich Cohen

Co-Founder & GMAT Assassin

Special Offer:

Save $75 + GMAT Club Tests Free
Official GMAT Exam Packs + 70 Pt. Improvement Guarantee

www.empowergmat.com/
*****Select EMPOWERgmat Courses now include ALL 6 Official GMAC CATs!*****