Find the average of first 10 prime numbers.

The correct answer is Option (4) → 12.9

A prime number has only two factors, 1 and itself; 1 is not prime, and 2 is the only even prime.

• The first 10 primes: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29

• Their sum: 129

• Average \(=\displaystyle\frac{129}{10}=12.9\)