I have 10 red socks and 10 blue socks in a drawer. The room is dark and I cannot see into the drawer.
How many socks must I take out to ensure that I have at least one matching pair?
How many must I take out to ensure I have at least a pair of red and a pair of blue?
February 23rd, 2010 | Category: 
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11 and 11?
3 socks to ensure one matching pair and 12 socks to ensure one pair of each color.
You’re right, Julie.
Only three would be needed to ensure a single pair of the same color, but you would need to take out twelve socks to guarantee a pair of each color.
You’re today’s winner!
all of them