Round all answers to 4 decimal places.
a. A bag contains 4 black marbles, 10 white marbles, and 9 red marbles. If a marble is drawn from the
bag, replaced, and another marble is drawn, what is the probability of drawing first a black marble and
then a red marble?
b. A bag contains 10 blue marbles, 9 red marbles, and 4 white marbles. If two different marbles
are drawn from the bag , what is the probability of drawing first a blue marble and then a white marble?