Pippi longstocking has 20 socks in 4 different colours. being the smart lass she is, she wants to?

Question

...  ensure that she pulls out 2 socks of the same colour in the shortest amount of time possible. knowing that, what's the minimum number of socks pippi has to pull out of the draw to ensure she has at least one pair of the same color?

Answer

The answer is 5

She has 4 different colours. 
The first 4 socks she pulls out may be one of each colour. 
The 5th sock HAS to be a colour she already has.

Pippi longstocking has 20 socks in 4 different colours. being the smart lass she is, she wants to?

Answers (1)