Question

The average of first 10 prime number is:

• A. 13.1
• B. 12.7
• C. 12.9
• D. 15.1

Answer 1

Answer:

C. 12.9

Solution: Given: First 10 prime numbers = 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 Formula used: Average = (sum of total observations)/ (numbers of observations) Calculation: Sum of first 10 prime numbers = 2 + 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29 ⇒ Sum of first 10 prime numbers = 129 The average of first 10 prime number = (Sum of first 10 prime numbers)/10 ⇒ The average of first 10 prime number = 129/10 ⇒ 12.9 ∴ The average of first 10 prime number is 12.9.