The sum of all the natural numbers from 51 to 100 is

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The sum of all the natural numbers from 51 to 100 is

1. 5050
2. 4275
3. 4025
4. 3775

Correct Option: D

As we know that the sum of N natural Numbers 1 + 2 + 3 ........ + n

S =	n ( n + 1)
	2

Given in the question,
∴ 51 + 52 + ..... + 100
We can write as below
⇒ 51 + 52 + ..... + 100 = (1 + 2 + 3 + 4 + 5 + ............ + 100) – ( 1 + 2 + 3 +..........+ 50)

=	100 × 101	−	50 × 51
	2		2

= 5050 – 1275 = 3775