Programers - 5 _ 평균 구하기

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