A box contains 3 blue marbles 4 red 6 green marbles and 2 yellow marbles If three marbles are picked...........

Quantitative Aptitiude (CLAT) Probability

A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If three marbles are picked at random, what is the probability that they are all blue?

1/455

2/455

4/455

1/91

Explanation:

Explanation: Given that there are three blue marbles, four red marbles, six green marbles and two yellow marbles.
Probability that all the three marbles picked at random are blue = 3C₃ / 15C₃ = (3 * 2 * 1) / (15 * 14 * 13) = 1/455