Mathematics
NULL
Medium
Question
In a drawer there are 4 white, 3 blue and 5 grey socks. Two socks are picked at random. What is the probability that both are of the same colour?
A
1/11
B
1
C
1/6
D
19/66
✓ Official correct answer
Community credibility
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A
1/11
No member explanations yet for this option.
B
1
No member explanations yet for this option.
C
1/6
No member explanations yet for this option.
D
19/66
No member explanations yet for this option.
Explanation
Favourable = C(4,2) + C(3,2) + C(5,2) = 19. Total = C(12,2) = 66. Probability = 19/66.