Question

Find the variance of first 30 natural numbers

• A. 92.64
• B. 74.92
• C. 78.45
• D. 85.31

Answer 1

Answer:

B. 74.92

The variance of first n natural numbers = (n² - 1)/12 The variance of first 30 natural numbers = (30² - 1)/12 = (900 - 1)/12 = 899/12 = 74.92