! and six red discs, and two discs were taken at random, it can be seen that
! the probability of taking two blue discs, P(BB) = (15/21)*(14/20) = 1/2.
! and six red discs, and two discs were taken at random, it can be seen that
! the probability of taking two blue discs, P(BB) = (15/21)*(14/20) = 1/2.