Question

3. Find the mean of first 50 natural numbers,​

Answer 1

Answer:

The mean of first 50 natural numbers is 25.5.

Step-by-step explanation:

we know that the sum of first n natural numbers is (1+2+3+…..+n) = n\frac{\left ( n+1 \right )}{2}

so we can say that (1+2+3+…..+50) = 50\frac{\left ( 50+1 \right )}{2} = 50\times \frac{51}{2} = 1275

and the average of first 50 natural numbers = \frac{1275}{50} = 25.5

Answer 2

➹A.P. of first 50 natural numbers

AP: 1,2,3................................ 50

a=1 ; d= 1 ; last term, l = 50

No. Of observations, n = 50

Sum of observations= n/2×(a+l)

= 50/2×(1+50)

= 1275

Mean= sum of observations / no. Of

observations

Mean= 1275 / 50

Mean= 25.5