Question

coin is tossed find the probability of coming tail on the coin

Answer 1

This question is actually harder to answer than it seems. The easy answer is 50%. But that is only true if the coin is unbiased. For the coin to be unbiased, the probability of getting heads or tail needs to be 50%. If this sounds like circular reasoning, it is.  No coin is entirely unbiased, so the only way to determine the probability of getting heads or tails is by experimenting. Flip the coin 1000 times, and use statistical methods to determine if the coin is likely to be biased or not.  In previous experiments, it has turned out that - if you flip a coin, and the heads side is facing up, the probability of getting heads is about 51%. And the same is true if the tails side is up: the probability of getting tails is about 51%