The average marks of 50 students in a class was found to be 64 If the marks of two students were inc...........

Quantitative Aptitude (CGL) Average

The average marks of 50 students in a class was found to be 64. If the marks of two students were incorrectly entered as 38

and 42 instead of 83 and 24, respectively, then what is the correct average?

This questions was previously asked in

SSC CGL 10 June 2019 Shift-3

61.24

64.54

62.32

61.86

- The initial average for 50 students is 64, meaning the total marks are 50 x 64 = 3200.

- Two students' scores were entered incorrectly, one as 38 instead of 83 and another as 42 instead of 24.

- The correct marks add to 83 + 24 = 107, while the incorrect marks sum up to 38 + 42 = 80.

- This is a difference of 107 - 80 = 27 marks needing to be adjusted.

- Adding these 27 marks to the original total gives a corrected sum of 3200 + 27 = 3227.

- The correct average is then 3227 ÷ 50 = 64.54.

Option 2: 64.54 is the correct answer.

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