The binomial formula is given by:
\[P(X=x) = C(n, x) \cdot \pi^x \cdot (1-\pi)^{n-x}\]
where:
- \(P(X=x)\) is the probability of \(x\) successes,
- \(C(n, x)\) is the combination of \(n\) items taken \(x\) at a time,
- \(\pi\) is the probability of success,
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