Solution to Mind Teaser - 1

First of all I am Sorry for posting answer so late. I have been under Doctor's Knife.

Question - https://steemit.com/mathematics/@crazybutterfly/mind-teaser-1
Solution:

ZERO

I had 3 Blue socks and 1 Pink sock.

=> chances of pair of Blue socks = 1/2
chances of pair of Mixed socks = 1/2
chances of pair of Pink socks = ZERO