Question 325622: A bag contains 4 white and 6 black balls. Two (2) balls are drawn at random. One at a time, unseen, without replacement. What is the probability that:
a. The 1st ball is white and the 2nd is black?
b. The 1st ball is black?
c. Both balls are white?
d. Both balls are black?
e. If a 3rd ball is selected or drawn, then set the probability that it is black if the first were white.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A bag contains 4 white and 6 black balls. Two (2) balls are drawn at random. One at a time, unseen, without replacement. What is the probability that:
a. The 1st ball is white and the 2nd is black?:::(4/10)(6/9)
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b. The 1st ball is black?:::(6/10)
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c. Both balls are white?:::(4/10)(3/9)
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d. Both balls are black?:::(6/10)(5/9)
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e. If a 3rd ball is selected or drawn, then set the probability that it is black if the first two were white.:::(6/8)
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Cheers,
Stan H.
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