Posted by Andrey L on Tuesday, April 21, 2009 at 2:11pm.
A jar contains 2 red marbles, 3 green marbles, 4 blue marbles, and 5 yellow marbles. Two marbles are drawn in succession, without replacement. The probability that neither is yellow?

Probabilities  Reiny, Tuesday, April 21, 2009 at 3:57pm
find prob of getting two yellows
= (5/14)(4/13) = 10/91
so prob that neither is yellow = 110/91 = 81/91