/**
 * Calculate probability in repeated trials
 * @param  {number} n Number of trials
 * @param  {number} r Number of successes
 * @param  {{x:number;y:number}} p Probability fraction (x/y)
 * @returns {number[]} Array containing [numerator, denominator]
 * @example repeatedTrial(5, 2, {x: 1/3, y: 2/3}); // [10, 27]
 */
export declare const repeatedTrial: (n: number, r: number, p: {
    x: number;
    y: number;
}) => number[];