SSC CHSL Model Paper 11

Question : 65 of 100

Marks: +1, -0

The average marks of 40 students was found to be 68. If the marks of two students were incorrectly entered as 48 and 64 instead of 84 and 46 respectively, then what is the correct average?

68.25
68.15
68.45
68.35

Validate

Solution:

Correct average

={ 40 × 68 - 48 - 64 + 84 + 46}/40

={ 2720-112 + 130 }/40

=2738/40=68.45

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