[Level 1] / [Python] 평균 구하기

https://school.programmers.co.kr/learn/courses/30/lessons/12944

프로그래머스

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def solution(arr):
    
    answer = 0

    sum = 0

    for i in arr:
        sum += int(i)

    sum = sum / len(arr)

    answer = sum
    
    return answer