Yuor sock drawer is a mess and contains 10 white socks, 12 black socks, and 4 red socks. How many sox would you have to pull out of the drawer to be sure you have a pair?
You probably mean how many do you have to pull out to be sure of haveing 2 the same colour
Well if you pull out 3 and you have not got 2 the same colour yet then the next one will have to be the same as one you already have. so the answer is 4