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
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.