• Negative Binomial Distribution: $P(n)=_{(n-1)}C_{(x-1)}p^x(1-p)^{n-x}$ $n$: number of trials $x$: number of success in n trials $p$: probability of success in each trial $P(n)$: probability of getting the $x$ success on the $n^{th}$ trial

Negative binomial distribution

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