SOLUTION: a bag contains 3 red discs, 4 black discs and 5 yellow discs. 2 discs are picked one after the other without replacement. Find the probability that a) the first disc is black and

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Question 459221: a bag contains 3 red discs, 4 black discs and 5 yellow discs. 2 discs are picked one after the other without replacement. Find the probability that
a) the first disc is black and the second is red
b) the first and second discs are yellow
c) the first is red and e second is yellow
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
a bag contains 3 red discs, 4 black discs and 5 yellow discs. 2 discs are picked one after the other without replacement. Find the probability that
a) the first disc is black and the second is red:::(4/12)(3/11)
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b) the first and second discs are yellow:::(5/12)(4/11)
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c) the first is red and e second is yellow:::(3/12)(5/11)
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Cheers,
Stan H.
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