✔ 문제

✔ 풀이

class Solution {
  public double solution(int[] arr) {
    double answer = 0;
    int total = 0;
    
    for(int i = 0; i < arr.length; i++) {
      total += arr[i];
    }
    
    answer = (double)total / arr.length;
    return answer;
  }
}