Binomial Distribution

• Binomial distribution is used to find the probability of choosing something X times out of N times

[!def] Probability of choosing something X times out of N times
$$
Pr(x|n, p) = nCx ; p^x (1-p)^{n-x}
$$
n = total number of trials
x = getting something x times
p = probability of one time

This is also called Binomial Distribution

• If order matters, use $nPr$
• For $nPr$ and $nCr$, see Permutation and Combination, respectively