SOLUTION: A bag contains 5 blue marbles, 4 white marbles and 3 red marbles. If three marbles are randomly selected from the bag,what is the probability that the marbles selected will be the

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: A bag contains 5 blue marbles, 4 white marbles and 3 red marbles. If three marbles are randomly selected from the bag,what is the probability that the marbles selected will be the       Log On

Hi
12 Marbles: 5B 4W 3R
Choose 3:  12C3 all ways this can be done

P(3 are same color) = P(B) + P(W) + P(R) = [5C3 + 4C3 + 3C3]/12C3 = (10+4+1/220 = 15/220 = 3/44 0r .0681

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