For all the resultawaiting students (like me ) and all preparing for '15. here is something to get you engaged
A box contains 100 coins out of which 99 are fair coins and 1 is a doubleheaded coin. Suppose you choose a coin at random and toss it 3 times. It turns out that the results of all 3 tosses are heads.
What is the probability that the coin you have drawn is the doubleheaded one?
Interesting Probability sum !
Re: Interesting Probability sum !
Bayes' rule:
(1 * 1/100) / (1 * 1/100 + 1/8 * 99/100) == 8/107
(1 * 1/100) / (1 * 1/100 + 1/8 * 99/100) == 8/107

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