Average of the squares of the first n natural numbers

The same question, asked 2 times: 10 Sep 2024 S3*, 17 Sep 2024 S1. Every wording below, oldest first.

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Question 1
10 Sep 2024 S3
58 $The average of the squares of the first 45 natural numbers is$
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Question 2
17 Sep 2024 S1
55 $The average of the squares of the first 47 natural numbers is$
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