프로그래머스 - 배열의 평균값

https://school.programmers.co.kr/learn/courses/30/lessons/120817

class Solution {
    public double solution(int[] numbers) {
        
        double answer = 0;
        int sum = 0;

        for (int i=0; i < numbers.length; i++){
            sum += numbers[i];
        }

        answer = (double)sum/numbers.length;

        return answer;
    }
}