Question 1186052
binomial distribution formula is:


p(x) = p^x * q^(n-x) * c(n,x)


q = 1 - p


c(n,x) = n! / (x! * (n-x)!)


n = 10 and p = .8
q = 1 - .8 = .2


p(9) = .8^9 * .2^1 * 10 = .268435456.
p(10) = .8^10 * .1^0 * 1 = .107374182


the full set of probabilities are shown below.


<img src = "http://theo.x10hosting.com/2021/101307.jpg" >


the sum of all probabilities is equal to 1, as it should be.