Civil Services OPSC OAS Mock Test Series 2025 Quantitative Aptitude Permutation and Combination

A bottle contains 7 blue marbles, 5 yellow marbles and 6 silver marbles. If a marble is drawn from the bottle at random, what is the probability that the marble drawn is silver in colour?

1
1/4
2
1/3
3
1
4
1/2
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