You have a certain number of socks in your drawer. But, because you have no sense of style, the only colors your socks come in are red and black. If you draw two socks at random (without replacing them into the drawer...that'd just be silly) the probability of you getting two red socks is 1/2. What is the minimum number of socks you need for this to be true? For a harder version, what is the minimum number of socks you need for this to be true AND for there to be an even number of black socks?
No comments:
Post a Comment