A jar contains g green and 2g red marbles. Three marbles are drawn in succession without replacement. Since there are twice as many reds as greens, it should be twice as likely that the last ball...

A jar contains g green and 2g red marbles. Three marbles are drawn in succession without replacement. Since there are twice as many reds as greens, it should be twice as likely that the last ball drawn is red rather than green. Verify this using the multiplication rule for conditional probabilities.