MathPHP\Probability\Distribution\Discrete\Pascal::PMF PHP Метод

b(x; r, P) = ₓ₋₁Cᵣ₋₁ pʳ * (1 - P)ˣ⁻ʳ

public static PMF ( integer $x, integer $r, float $P ) : float
$x	integer	number of trials required to produce r successes
$r	integer	number of successful events
$P	float	probability of success on an individual trial
Результат	float

    public static function PMF(int $x, int $r, float $P) : float
    {
        return NegativeBinomial::PMF($x, $r, $P);
    }

Pascal