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

Redeem

combinations mgmat 1

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 94
Joined: Tue Oct 14, 2008 1:05 pm

combinations mgmat 1

by simba12123 » Tue Oct 14, 2008 1:10 pm
How many ways are there to award a gold, silver and bronze medal to 10 contending teams?

a. 10x9x8

b.10!/3!7!

c. 10!/3!

d. 360

e. 300



however after plugging into the combinations original formual b looks correct and cannot justify qa.
qa ia a
Top
Source: — Problem Solving |
Legendary Member
Posts: 2467
Joined: Thu Aug 28, 2008 6:14 pm
Thanked: 331 times
Followed by:11 members

by cramya » Tue Oct 14, 2008 2:03 pm
My thought is the order matters here(since gold->silver->bronze in that order)

So its permutations 10P3

= 10 * 9 * 8 * 7! / 7!

= 10*9*8
Top
Senior | Next Rank: 100 Posts
Posts: 94
Joined: Tue Oct 14, 2008 1:05 pm

combinations mgmat 1

by simba12123 » Tue Oct 14, 2008 2:54 pm
That is the only way of explaining this. I just wish it would explain that the medals had to be ordered in this manner only and it would have cleared up the ambiguity. thanks

imo questions could have been written better
Top
Post new topic Post Reply
• Page 1 of 1