Function roulette(probabilities: number[]): number Returns the index of the item obtained given the probabilitiesparam probabilities- The probabilities. // There is a 10% chance for index 0, 30% for index 1 and 60% for index 2 to be returned roulette([0.1, 0.3, 0.6]); roulette([10, 30, 60]); // There is a 1/6 chance for index 0, 2/6 for index 1 and 4/6 for index 2 to be returned roulette([1, 2, 4]); returns The index of the item obtained given the probabilitiesgroup Mathsubgroup Random