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In: Statistics and Probability

Conditional probability You have two coins in your pocket. One is a regular coin and the...

Conditional probability
You have two coins in your pocket. One is a regular coin and the other is a weighted coin that has a 75% chance of landing heads up. You can’t tell the coins apart by inspecting them. You take a coin out of your pocket and toss it. It lands heads up.

a. What is the probability that the coin is the fair coin?

b. How many times would you decide to flip the coin before you are pretty sure it’s the fair coin?

Explain your answer.

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