Problem 2: Urn A contains 10 balls numbered 1-10. Urn B contains 1000 balls numbered 1-1000. Your friend picks a ball at random from one of the urns (but you don't know which). The ball she picks has the number 5 on it. What is the probability that the ball was drawn from Urn A?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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Problem 2: Urn A contains 10 balls numbered 1-10. Urn B contains 1000 balls numbered
1-1000. Your friend picks a ball at random from one of the urns (but you don't know which). The
ball she picks has the number 5 on it. What is the probability that the ball was drawn from Urn
A?
Transcribed Image Text:Problem 2: Urn A contains 10 balls numbered 1-10. Urn B contains 1000 balls numbered 1-1000. Your friend picks a ball at random from one of the urns (but you don't know which). The ball she picks has the number 5 on it. What is the probability that the ball was drawn from Urn A?
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