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One value misread or wrongly entered: find the correct average

This type of question, asked 4 times: 14 Jul 2023 S3, 18 Jul 2023 S1, 17 Sep 2025 S2, 22 Sep 2025 S3. All 4 questions below, oldest first.

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  1. Question 1

    14 Jul 2023 S3

    52
    The average of 36 numbers was found to be 45. Later, it was detected that 84 was misread as 48. Find the correct average of the given numbers.

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  2. Question 2

    18 Jul 2023 S1

    70
    The average weight of a team of 20 people was calculated to be 59.8 kg and it was later discovered that one weight was misread as 68 kg instead of 77 kg. The correct average weight is:

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  3. Question 3

    17 Sep 2025 S2

    56
    In a group of 40 boys, the average height was initially determined to be 160 cm. However, it was later discovered that the height of one boy was incorrectly recorded as 165 cm when it should have been 156 cm. Calculate the accurate average height.

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  4. Question 4

    22 Sep 2025 S3

    67
    The average marks of 3030 students in a class is 6262. If the marks of one student were wrongly entered as 8282 instead of 6262, what is the CORRECT average?

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