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It's easy. You only have to do the Selection. If we select one of the two groups, the other group is selected by default.

Therefore number of ways of selecting 5 people from 10 = C(10, 5) = 252

by visheshchadha

Fri Sep 27, 2013 11:32 am
Forum: Problem Solving
Topic: Teams
Replies: 3
Views: 1460

There is no need to even put values for the First and Second Statement alone. I) x < 2z < y => x/2 < z < y/2 Now, y/2 may be bigger than x and in that case x < z < y, else not. So, no unique solution. II) 2x < z < 2y Now, 2x may be lesser than y and in that case x < z < y, else not. So, no unique so...

by visheshchadha

Fri Sep 27, 2013 11:11 am
Forum: Data Sufficiency
Topic: Is Z between Z & Y?
Replies: 9
Views: 6363