Find the average of first 20 consecutive natural numbers.

12.2 10.78 16.45 10.5

10.5

Use the formula: Average of first n consecutive natural numbers is = \(\frac{(n\,+\,1)}{2}\) Here, n = 20 Thus, average = \(\frac{(20\,+\,1)}{2}\) = \(\frac{(21)}{2}\) = 10.5