Question
A bag contains 6 balls of which 3 are red and 3 are
black. They are drawn successively without replacement. What is the probability that colors are alternate?Solution
We can choose balls as black, red or red black alternately, Required probability = 2 Ă— (3/6 Ă— 3/5 Ă— 2/4 Ă— 2/3 Ă— 1/2 Ă— 1) = 1/10
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