BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

PS3

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Legendary Member
Posts: 1337
Joined: Sat Dec 27, 2008 6:29 pm
Thanked: 127 times
Followed by:10 members

by Night reader » Sat Jan 22, 2011 3:57 pm
GHong14 wrote:Image
4C2=4*3/2=6 <- total outcomes
favorable outcomes -> 1
P=1/6
Top
User avatar
Newbie | Next Rank: 10 Posts
Posts: 8
Joined: Sat Jan 22, 2011 12:29 pm
Thanked: 1 times

by hrkrishna » Sat Jan 22, 2011 9:32 pm
Since 2 are selected from 4 the possibilities are 4C2 = 6

only X + Y, and X-Y product gives you the favorable out come of X^2 - (bY)^2.

So, the result is 1/6.
Top
Post new topic Post Reply
• Page 1 of 1