Q. Find the average of first 50 natural numbers?
Answer: 25.5
Notes: Because we know that the sum of first n natural numbers is (1+2+3+.....+n) $latex = n\frac{\left ( n+1 \right )}{2}&s=1$ so we can say that (1+2+3+…..+50) $latex = 50\frac{\left ( 50+1 \right )}{2} = 50\times \frac{51}{2} = 1275&s=1$ and the average of first 50 natural numbers = $latex \frac{1275}{50} = 25.5&s=1$ Option [c] is the right answer