# What is the probability it will come up heads 25 or fewer times?

Question 1

A coin that is unfair has 0.65 chance of being heads. It is flipped 50 times.

You can calculate the probability that the coin will come up heads more than 25 times using a Binomial Distribution Formula. It is simply P(x) = n!/x! * (n-x)!)*(p^x)*((1-p)^(n-x)) where n = 50, x = 25, p = 0.65 and q= 1-p=0.35

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