UPSC CDS 2 2022 Math Paper

Mean of observations = sum of observations/Number of observations

The sum of observations = X
⇒ Initial average =

X

50

=78.4
After correction,
Final average =

[X+(95−59)+(25−52)]

50

⇒ Final average =

(X+9)

50

Therefore,required difference in average
⇒

(X+9−X)

50

=

9

50

=0.18