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A box contains 10 purple marbles, 11 green marbles and 7 yellow marbles. if you pick two without looking, what is the probability that one will be green and the other will be yellow
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A box contains 10 purple marbles, 11 green marbles and 7 yellow marbles. if you pick two without looking, what is the probability that one will be green and the other will be yellow

User Oleg Kuts
by
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1 Answer

7 votes
Use combination
probability = (11C1 + 7C1)/28C2
probability = (11+7)/378
probability = 18/378
probability = 1/21
User Extricate
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