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An urn contains 3 red balls and n white ...

An urn contains 3 red balls and `n` white balls. Mr. A draws two balls together from the urn. The probability that they have the same color is 1/2 Mr. B. Draws one balls form the urn, notes its color and replaces it. He then draws a second ball from the urn and finds that both balls have the same color is 5/8. The possible value of `n` is (a)`9` b. `6` c. `5` d. 1

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CENGAGE PUBLICATION-PROBABILITY-All Questions
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