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

    public static function PMF(int $k, float $p) : float
    {
        Support::checkLimits(self::LIMITS, ['k' => $k, 'p' => $p]);
        if ($k === 0) {
            return 1 - $p;
        } else {
            return $p;
        }
    }