The probability of selecting a blue marble on the first draw is 3/5. After that, there will be 2 blue marbles left in a total of 4 marbles. Therefore, the probability of selecting a blue marble on the second draw is 2/4.
So, the probability of both marbles being blue is (3/5) * (2/4) = 6/20 = 0.3
Therefore, the correct answer is 0.3.
An urn contains 2 red and 3 blue marbles. Two marbles are selected at random, one after the other and without replacement, from the urn. Calculate the probability that both marbles are blue.
0.24
0.86
0.14
0.3
1 answer