railway RRB Technician Grade 1 Mock Test 2024 Quantitative Aptitude Probability

A basket contains 4 red, 5 black, 3 green, and 4 white marbles. If 2 marbles are drawn at random from the basket. What is the probability that both are green balls?

1
13/2
2
15/2  
3
2/3
4
1/40
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