Challenge #11 - Finding the Percentage

if __name__ == '__main__':

    n = int(input())

    student_marks = {}

    for _ in range(n):

        name, *line = input().split()

        scores = list(map(float, line))

        student_marks[name] = scores

    query_name = input()


    marks = student_marks[query_name]

    avg = sum(marks)/len(marks)

    print('{a:1.2f}'.format(a = avg)) 

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