In: Statistics and Probability
Given 12 coins, with possibly (but not necessarily) one coin being counterfeit (heavy or light). You have a comparison scale and you want to determine the fairness of all with a minimum number of comparisons.
(a) What is the smallest number of comparisons required? Give a theoretical reason. (Hint: each comparison has three possible outcomes)
(b) Give the procedure to identify the false coin or to show all are fair.
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