SOLUTION: A box contains 5 orange disks, 4 red disks, and 1 blue disk. You are to select two disks at random and without replacement from the box. What is the probability that the first disk

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Question 627196: A box contains 5 orange disks, 4 red disks, and 1 blue disk. You are to select two disks at random and without replacement from the box. What is the probability that the first disk you select will be red and the second disk you select will be orange?
Found 2 solutions by reviewermath, nerdybill:
Answer by reviewermath(1029) About Me  (Show Source):
You can put this solution on YOUR website!
probability = %284%2F%285%2B4%2B1%29%29%2A%285%2F%285%2B3%2B1%29%29
= highlight%282%2F9%29

Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
A box contains 5 orange disks, 4 red disks, and 1 blue disk. You are to select two disks at random and without replacement from the box. What is the probability that the first disk you select will be red and the second disk you select will be orange?
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total disks: 5+4+1=10
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probability of first pick: 4/10
probability of second pick: 5/9
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probability of both: 4/10 * 5/9 = 20/90 = 2/9