# Math Help - Binomial Probability

1. ## Binomial Probability

I'm having an difficult time, determining how to to start in setting up the problem.

Use the binomial probability to show x successess given to the probability of p of success in an single trial.

n = 5, x = 2 , p = 0.25

2. ${5 \choose x} \left(0.25\right)^x \left(0.75\right)^{5-x}$

3. Hi

Binomial law is used when you repeat n independent experiences whose result can only be "success" with a probability p or "failure" with a probability (1-p)

The probability to get k success in n trials is given by the formula

$P(X=k) = \binom{n}{k} p^k (1-p)^{n-k}$