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

Redeem

Permuations

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 54
Joined: Tue Sep 20, 2011 7:58 am
Thanked: 1 times
Followed by:1 members

Permuations

by sparkle6 » Sun Sep 25, 2011 6:23 am
Meg and Bob are among the 5 participants in a cycling race. If each participant finishes the race and no two participants finish at the same time, in how many different possible orders can the participants finish the race so that Meg finishes ahead of Bob?

A. 24
B. 30
C. 60
D. 90
E. 120
Top
Source: — Problem Solving |
Legendary Member
Posts: 966
Joined: Sat Jan 02, 2010 8:06 am
Thanked: 230 times
Followed by:21 members

by shankar.ashwin » Sun Sep 25, 2011 6:28 am
5!/2 (5! gives total ways, in exactly half the cases Meg will finish ahead of Bob)

C
Top
User avatar
Legendary Member
Posts: 540
Joined: Sat Dec 20, 2008 7:24 pm
Thanked: 37 times
Followed by:6 members

by navami » Mon Sep 26, 2011 2:17 am
IMO 60
This time no looking back!!!
Navami
Top
Post new topic Post Reply
• Page 1 of 1