Question 246828: A bag contains 5 blue marbles, 6 red marbles, and 9 green marbles. Two marbles are drawn at random, what is the probability of selecting two red marbles?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A bag contains 5 blue marbles, 6 red marbles, and 9 green marbles. Two marbles are drawn at random, what is the probability of selecting two red marbles?
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# of ways to select two red: 6C2 = 15
# of ways to select two from the bag: 20C2 = 190
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P(2 red) = 15/190 = 3/38
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Cheers,
Stan H.
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