SSC CGL 11 Jun 2019 Shift 1 Paper

Question : 56 of 100

Marks: +1, -0

The average marks of 45 students was found to be 66.
If the marks of two students were incorrectly entered as 28 and 64 instead of 82 and 46 respectively, then what is the correct average?

67.2
66.8
66.4
66.6

Validate

Solution:

Total marks of all students

=45 \×66=2970

Corrected average

=\ {2970-28-64+82+46}/{45}=66.8

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