Question

# The variance of first $$20$$ natural numbers is

A
133/4
B
279/2
C
133/2
D
399/4

Solution

## The correct option is A $$133/4$$Variance of first $$n$$ natural numbers is $$\dfrac {n^{2} - 1}{12}$$so, for $$n = 20 \rightarrow \dfrac {20^{2} - 1}{12} = \dfrac {133}{4}$$Mathematics

Suggest Corrections

0

Similar questions
View More

People also searched for
View More