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Study the given information carefully and answer the question that follow:
A basket contains 4 red, 5 blue and 3 green marblesIf two marbles are picked at random what is the probability that both are red ?
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By: anil on 05 May 2019 01.34 am
The total number of ways of picking two marbles is $$^{12}C_2 = 66$$ The total number of ways of picking two red marbles is $$^4C_2 = 6$$ Hence, the required probability is $$frac{6}{66} = frac{1}{11}$$
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