well, that seemed a very easy approach to do so..
The formula that i have used was posted by Bunuel in some of his post. And to tell you the truth, i have often used this formula to derive the correct answer..
@Bunuel, can you please point out if i used the formula incorrectly or where exactly i made a mistake.
Appreciation in KUDOS please!
Knewton Free Test 10/03 - 710 (49/37)
Princeton Free Test 10/08 - 610 (44/31)
Kaplan Test 1- 10/10 - 630
Veritas Prep- 10/11 - 630 (42/37)
MGMAT 1 - 10/12 - 680 (45/34)