Your drawer contains 10 red socks and 7 blue socks. It's to dark to see which are which, but you grab two anyway. What is the probability that you get one of each color?

P (both red) = (10/17) (9/16)

P (both blue) = (7/17) (6/16)

P (both same) = sum of above 2 = (90+42) / (16*17) = 132 / (16*17) = 0.485

coz both same means both blue or both red