Question

find the mean of first'n' natural numbers​

Answer 1

Answer:

Correct option is

B

2

n+1

We know that sum of first n natural numbers is

2

n(n+1)

So mean of the first n natural numbers =

number

sumofnnaturalnumbers

=

n

2

n(n+1)

=

2

(n+1)

Answer 2

Let us calculate the sum of the natural numbers

The sum of the first four natural numbers are

⇒ 1 + 2 + 3 + 4

⇒ 10

⇒ 4(4 +1)/2

The sum of the first five natural numbers are

⇒ 1 + 2 + 3 + 4 + 5

⇒ 15

⇒ 5(5 + 1)/2

The sum of the n natural numbers is

⇒ 1+ 2+ 3+ 4+……..+n

⇒ n(n+1)/2

Mean = n(n+1)/2/n

Mean = n(n+1)/2n

Mean = (n+1)/2

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