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1. n a container , there are 2 green marbles and 2 red marbles .You randomly pick two marbles. What is the probability that both of them are green?
- A. 1/4
- B. 1/4
- C. 1/4
- D. 1/4
Answer: Option C
Explanation:
green ball = 2
Red ball = 2
From 4 balls, possibility of 2 green = 4C2 = 6
From 2 balls, possibility of 1 green = 2C2 = 1.
From rest 2 balls, possibility of being green = 2C2 = 1
Possibility of 2 green = (2C2 x 2C2)/4C2 = (1×1)/6 = 1/6
Ans: 1/6
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