A drawer contains a mixture of 12 black socks,
8 white socks, and 4 red socks. You randomly
select 2 socks to wear. Determine the
probability that both are black. (Give your
answer as a fraction.)
That's
"12 black socks Choose 2", or 12C2 ways
out of
"24 possible socks Choose 2", or 24C2 ways.
So we have:
Edwin