Question

Find the variance of first 10 natural numbers

• A. 7.5
• B. 9.1
• C. 10.2
• D. 8.25

Answer 1

Answer:

D. 8.25

The variance of first n natural numbers = (n² - 1)/12 The variance of first 10 natural numbers = (10² - 1)/12 = (100 - 1)/12 = 99/12 = 8.25