GATE CS 2017 Set 2 — Question 60
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Engineering Mathematics → Probability & Statistics → 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 = .The total number of ways to choose 2 socks out of 10 is:
To have both socks of the same color, we can choose 2 red, 2 green, or 2 blue socks:
To have both socks of the same color, we can choose 2 red, 2 green, or 2 blue socks:
- Ways to choose 2 red socks:
- Ways to choose 2 green socks:
- Ways to choose 2 blue socks:
P(E) is:Continue learning with Success Tracker
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