The mean of 100 items is 47 It was discovered that three items which should have been 60 70 80 were ...........

Quantitative Aptitude (MTS) Average

The mean of 100 items is 47.It was discovered that three items which should have been 60, 70, 80 were wrongly read as 40, 20,

50, respectively. The correct mean is:

This questions was previously asked in

SSC MTS 12th October 2021 Shift-1

- The mean of 100 items is 47, implying the total sum is 4700 (since mean = total sum/number of items).

- Three items were misread: they should be 60, 70, and 80, but were read as 40, 20, and 50.

- The actual total of these three numbers should be 60 + 70 + 80 = 210.

- However, they were summed as 40 + 20 + 50 = 110.

- The difference is 210 - 110 = 100. This should be added to the total sum.

- Corrected total sum = 4700 + 100 = 4800.

- New mean = 4800/100 = 48.

Option:1 - 48 is the correct answer.

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