# SOLUTION: A bag has 2 black and 4 white marbles. Two are selected at random without replacement. What is the probability that both are black or both are white?

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 Click here to see ALL problems on Probability-and-statistics Question 299421: A bag has 2 black and 4 white marbles. Two are selected at random without replacement. What is the probability that both are black or both are white?Answer by Greenfinch(383)   (Show Source): You can put this solution on YOUR website!To get two blacks, chance is 2/6 on 1st pick and 1/5 on second. Chance is thus 2/6 x 1/5 = 2/30 or 1/15 To get two whites, chance is 4/6 on first pick and 3/5 on second. Chance is 12/30 or 2/5