<PRE><B>Question 252557</B>
We have a combination problem.
(i) you both will enter the same section? 
You want to be with your friend in the 40 group OR the 60 group. Here is the probability:

(40C2*60C0 + 40C0*60C2) / (100C2) = .5151

(ii) you both will enter different sections?

(40C1*60C1 + 40C1*60C1) / (100C2) = .0404

we add another because you could be in the 40 or in the 60 group separated from friend.

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