medium · GMAT Quant
Urn A contains 3 red and 5 white balls. Urn B contains 6 red and 2 white balls. An urn is chosen at random with equal probability, and then one ball is drawn from it.
Given that the ball drawn is red, what is the probability it came from Urn B?
- 1/2
- 3/5
- 2/3
- 3/4
- 4/5
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