Posted by Vince on Tuesday, June 7, 2011 at 2:30pm.
A bag has 5 red marbles, 6 blue marbles and 4 black marbles. What is the probability of picking a
blue marble, replacing it, and then picking a black marble?

MATH  Reiny, Tuesday, June 7, 2011 at 3:02pm
what is (6/15)(4/15) ?