four coins, of which 3 are fair coins and the third is a fake coin that has “heads” onboth sides. Bob selects a random coin and tosses it. (a) What is the probability that it comes up heads? (b) Given that it does come up heads, what is the probability that the coin that Bob tossed was one of the fair coins?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.8: Probabilities Of Disjoint And Overlapping Events
Problem 2C
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Bob has four coins, of which 3 are fair coins and the third is a fake coin that has “heads” onboth sides. Bob selects a random coin and tosses it.
(a) What is the probability that it comes up heads?
(b) Given that it does come up heads, what is the probability that the coin that Bob tossed was one of the fair coins?

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