Problem Solving (PS) | Re: In his pocket, a boy has 3 red marbles, 4 blue marbles, and

In Such cases, Go for the worst case scenario and hence here we can assume that balls drawn first is (Blue or Green) = 4 and then a single ball to make sure that the guy has atleast one ball of each color which is +1.

Hence the answer is 4+4+1 = 9

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