Question

A box contains 20 red marbles and 30 blue marbles. a second box contains 10 white marbles and 40 black marbles. if you choose one marble from each box without looking, what is the probability that you get a blue marble and a black marble?

Answer 1

P(blue marble) = 30/50 = 3/5 = 0.6
P(black marble) = 40/50 = 4/5 = 0.8
P( blue marble AND black marble) 0.6 x 0.8 = 0.48