Multiple Choice Questions

Tue mean of 50 items was 24 Later on it was discovered that two items were misread as 83 and 17 inst...........

Quantitative Aptitude (MTS) Average

Tue mean of 50 items was 24. Later on, it was discovered that two items were misread as 83 and 17 instead of 38 and 77. The

correct mean is:

This questions was previously asked in

SSC MTS 13th October 2021 Shift-3

24.3

23.4

22.5

- The original mean of the 50 items is calculated as 24.

- Total sum of these items = (mean × number of items) = 24 × 50 = 1200.

- Two items were misread: 83 instead of 38, and 17 instead of 77.

- Incorrect total sum = 83 + 17 = 100.

- Corrected sum = 38 + 77 = 115.

- Adjusted total sum = 1200 - 100 + 115 = 1215.

- New mean = Adjusted total sum / number of items = 1215 / 50 = 24.3.

- Option 1: 24.3 is the correct answer.

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