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4.1: Гіпергеометричний розподіл
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$h(x)=\frac{\left(\begin{array}{l}{A} \\ {x}\end{array}\right)\left(\begin{array}{c}{N-A} \\ {n-x}\end{array}\right)}{\left(\begin{array}{l}{N} \\ {n}\end{array}\right)}\nonumber$ б.\(P(x=5)=\frac{\... $h(x)=\frac{\left(\begin{array}{l}{A} \\ {x}\end{array}\right)\left(\begin{array}{c}{N-A} \\ {n-x}\end{array}\right)}{\left(\begin{array}{l}{N} \\ {n}\end{array}\right)}\nonumber$ б. $P(x=5)=\frac{\left(\begin{array}{c}{30} \\ {5}\end{array}\right)\left(\begin{array}{c}{20} \\ {5}\end{array}\right)}{\left(\begin{array}{c}{50} \\ {10}\end{array}\right)}$