The Socks

Probability Level 1

Cathy has twelve black socks and twelve white socks in her drawer.

In complete darkness, and without looking, what is the minimum number of socks must she take from the drawer in order to be sure to get a pair that match?

NOTE: she cannot take all socks at a time.

3 2 5 4

Vishwa Tej by Vishwa Tej , 22, India

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1 solution

Vishwa Tej
Jul 2, 2015

Solution: 3

Socks do not come in in left and right, so any black will pair with any other black and any white will pair with any other white. If you have three socks and they are either colored black or white, then you will have at least two socks of the same color, giving you one matching pair.

2 Helpful 0 Interesting 0 Brilliant 0 Confused

she can pick up all socks at one time . she will have all pairs matching. so ans - 1

Shobhit Singh - 5 years, 11 months ago

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ok,thanq i will edit the question

Vishwa Tej - 5 years, 11 months ago

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