perm & combinations

[This topic has 3 member replies]

Free $100 Amazon.com Gift Card - Buy a GMAT course using a Beat The GMAT discount code between Mar 8-22 and get a $100 Amazon.com Gift Card. Learn more!

« View previous topic

View next topic »

punitkaur
Really wants to Beat The GMAT!

Joined: 13 Apr 2009
Posts: 168

Thanks given: 3
Thanked 5 times in 5 posts

Topic: perm & combinations

Mon Nov 02, 2009 12:03 pm

	Elapsed Time:	00:00		Why a timer is critical to improving your score
	Lap #[LAPCOUNT] ([LAPTIME])

. A computer game has five difficulty levels. In each level you can choose among four different scenarios except for the first level, where you can choose among three scenarios only. How many different games are possible?

a) 18
b) 19
c) 20
d) 21
e) None of the above

My ans is 4x4x4x4x3.

however, the ans adds those values rather than multiply.

venubab
Just gettin' started!

Joined: 01 Nov 2009
Posts: 13

Thanks given: 0
Thanked 1 times in 1 posts

Wed Nov 04, 2009 2:49 am

Answer is 4x4x4x4x3

life is a test
Really wants to Beat The GMAT!

Joined: 02 Mar 2009
Posts: 138

Thanks given: 4
Thanked 9 times in 9 posts

Wed Nov 04, 2009 3:44 am

punitkaur wrote:

the question is not asking about the different order you can play the game in (e.g. play difficulty 4 and scenario 3 first vs playing difficulty 2 and scenario 1 first etc.) but rather the different num of unique games that are possible. in the attached there are only 19 different branches (i.e. unique games) irrespective of how you order these branches.

hope that helps.

Attachments

This post contains an attachment. You must be logged in to download/view this file. Please login or register as a user.