Binomial distribution formula

If we know X\sim B(n,p):

P(X=x)=^nC_x\space p^x (1-p)^{n-x}

• P(X=x) is the probability of getting exactly x successes.
• p is the probability of any single trial being successful.
• n is the number of trials
• x is the exact number of successes we are checking the probability of.

Remember that ^nC_x is a binomial combination.