GATE EE 2017 Set 2 — Question 60
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General Aptitude → Quantitative Aptitude → Elementary Statistics & Probability
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Question
There are 3 red socks, 4 green socks and 3 blue socks. You choose 2 socks. The probability that they are of the same colour is
Correct answer
(D) 4/15
Solution
Total number of socks = .
Total ways to choose 2 socks = .
Favorable outcomes (same color):
Probability = .
Total ways to choose 2 socks = .
Favorable outcomes (same color):
- Both red:
- Both green:
- Both blue:
Probability = .
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