The average of the prime numbers between 1 and 20 is

A9.525

B8.625

C9.625 ✓ Correct

D8.525

Correct answer: (C) 9.625

Explanation

The average of these primes is 9.625.

Primes between 1 and 20: 2, 3, 5, 7, 11, 13, 17, 19.

There are 8 such primes.

Their sum = 77.

Average = 77 / 8 = 9.625.

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