The average of first 50 natural numbers is : Options: A . &nbsp12.25 B . &nbsp21.25 C . &nbsp25 D . &nbsp25.5

The average of first 5

Question

The average of first 50 natural numbers is :

Options:

A . 12.25

B . 21.25

C . 25

D . 25.5

Answer: Option D

Sum of first n natural numbers = `(n(n + 1))/(2)`

So, average of first n natural numbers = `(n(n + 1))/(2n)` = `(n + 1)/(2)`

Required average = `((50 + 1)/(2))` = `51/2` = 25.5

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