Question 1197947: A box contains two kinds of pieces: disks and marbles. In all, there are 4 red disks, 2 blue disks, 2 yellow disks, 3 red marbles, 2 blue marbles, and 3 yellow marbles. Pressing a button drops a piece and the piece is not put back in the box. What is the probability that when you press the button, a red disk will fall out, and when you press it again, a yellow marble will fall out?
Answer by ewatrrr(24785)   (Show Source):
You can put this solution on YOUR website! 8 Disks: 4R, 2B, 2Y
8 Marbles: 3R, 2B, 3Y
16 Pieces
P(R Disk) = 4/16 = 1/4
P(R disk & then Y Marble) = (1/4)(3/15) = 3/60= 1/20
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