• https://math.stackexchange.com/questions/2033370/how-to-determine-the-number-of-coin-tosses-to-identify-one-biased-coin-from-anot/2033739#2033739   Suppose there are two coins and the percentage that each coin flips a Head is $$p$$ and $$q$$, respectively. $$p, q \in [0,1]$$, $$p \neq q$$, and the values are given and known. If you are free to flip one of the coins any number of times, how many times $$n$$ do you have to flip the coin to decide with some significance level $$\left( \textrm{say } \alpha = 0.05 \right)$$ that it’s the $$p$$ coin or the $$q$$ coin that you’ve been flipping? The distribution of heads after $$n$$ flips for a coin will be a binomial distribution with means at $$pn$$ and…