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A bag contains 6 blue marbles, 5 white marbles, and 4 red marbles. If three marbles are randomly selected from the bag, what is the probability that the marbles selected will be of the same color? Express your answer as a common fraction.

 Sep 25, 2020
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The probability you draw all blue is 6/15 * 5/14 * 4/13= 120/2730

all white: 5/15 * 4/14 * 3/13= 60/2730

all red: 4/15 * 3/14 * 2/13= 24/2730

add them together to get probability of any one of them happening: (120+60+24)/2730

=204/2730

=34/455

 Sep 26, 2020

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