P X 1 p n X where n n is the number of trials p p is the probability of success on a single trial and X X is the number of successes. How to Work a Binomial Distribution Formula. The probability of success on individual trial.
If the outcomes of the experiment are more than two but can be broken into two probabilities p and q such that p q 1 the probability of an event can be expressed as binomial probability.
For example if a six-sided die is rolled 10 times the binomial probability formula gives the probability of rolling a three on 4. Use the formula for binomial probability. Lets get to know the elements of the formula. P X nCx px1-pn-x where p is the probability of success In the above equation n C x is used which is nothing but a combination formula.