Question

Variance of first 20 natural numbers is

विकल्प

• 32.25

• 44.25

• 33.25

• 30

Answer 1

33.25

Explanation;

Hint:

Variance of 20 natural numbers is

= `(20^2 - 1)/12`

= `(400 - 1)/12`

= `399/12`

= 33.25