Questions about the world of GMAT Math from other sources and general math related questions.
saiindukuri87
Students
 
Posts: 18
Joined: Fri Jan 29, 2010 10:04 pm
 

DS problem

by saiindukuri87 Tue Aug 16, 2011 8:44 am

Can anyone help me solve the below data sufficiency problem.

In how many ways can n different balls be arranged in r slots?
(1) Given r balls and n slots to arrange the balls in, the balls can be arranged in 210 ways.
(2) If we only need to select and not arrange n balls for r slots, we can do it in 35 ways.
jnelson0612
ManhattanGMAT Staff
 
Posts: 2664
Joined: Fri Feb 05, 2010 10:57 am
 

Re: DS problem

by jnelson0612 Fri Aug 19, 2011 7:05 pm

What is the original source of the question?
Jamie Nelson
ManhattanGMAT Instructor