LalaB wrote:
The integers n and t are positive and n > t > 1. How many different subgroups of t items can be formed from a group of n different items?
(1) The number of different subgroups of n − t different items that can be formed from a group of n different items is 680.
(2) nt = 51
good kaplan question. just wanted to share with you.
One of the easier ways to solve DS questions is always to look at each answer choice at glance. Just to find whether there is any idea comes to mind by looking
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