Розрахунок: RkoSYf - 1

P__n* (k) =
C(^k;_n)* p^^k* q^^(n-k)

P__n* (k) = C(^k;_n)* p^^k* q^^(n-k) $P_{n}\cdot (k)$ = $C_{n}^{k}\cdot p^{k}\cdot q^{(n-k)}$

P__n* k =

n!* p^^k* q^^(n-k)

/ (n-k)!/ k!

$P_{n}\cdot k$ = $\frac{n!\cdot p^{k}\cdot q^{(n-k)}}{(n-k)!\cdot k!}$

P__n =

n!* p^^k* q^^(n-k)

/ (n-k)!/ k!/ k

$P_{n}$ = $\frac{n!\cdot p^{k}\cdot q^{(n-k)}}{(n-k)!\cdot k!\cdot k}$

P__n =

n!* p^^k* q^^(n-k)

/ (n-k)!/ k/ k!

$P_{n}$ = $\frac{n!\cdot p^{k}\cdot q^{(n-k)}}{(n-k)!\cdot k\cdot k!}$