A band leader randomly selects 2 students out of 80 band members. If you and your brother are both band members, what is the probability that you are both selected?
The probability of choosing one of them is 2 / 80 .
the probability of choosing
the other one is 1 / 79 .
The probability of both things happening is
(2/80) x (1/79) = 1/3160
