UPSC NDA Math Model Paper 4

Given: For a data set the coefficient of variation is 70% and standard deviation is 16
Here, we have to find the mean for the same data set.
Let mean be x
As we know, Coefficient of variation =

standard deviaiton

Mean

×100
⇒ Coefficient of variation =

16

x

×100=70
⇒x=

16

70

×100
⇒x=22.85 (approximately)
Hence, option D is the correct answer.