1. 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? September 23, 2025 by Admin A. 1/455 B. 2/455 C. 1/91 D. 4/455 ✅ The correct answer is option A. 1/455.
