How do you generalise that the probability of "head" occurring on a coin is 0.5? Supposedly I toss a coin 1000 times a day for a period of 10 days. Each day the probability of head occurring on the coin changes. For instance - 670 times getting a head on day 1, 567 times getting a head on day 2 and so on. So each time, the probability of a head occuring isn't 0.5, so can someone please explain why we generalise that the probability of a head occuring on tossing of a coin is 0.5??


why we generalise that the probability of a head occuring on tossing of a coin is 0.5??

I don't think you can make that generalization unless you further assume that the probability of head on each day is itself a random variable with expectation 0.5 (e.g. one day is 0.6, another day is 0.4, etc. on average it is 0.5).
