The average of prime numbers between 1 and 20 is-

Answer: Option B

The prime number between 1 and 20 is 2, 3, 5, 7, 11, 13, 17, 19
∴ Required average
$$\begin{array}{rl}& =\frac{\text{sum of prime numbers}}{8}\\ & =\frac{2+3+5+7+11+13+17+19}{8}\\ & =\frac{77}{8}\\ & =9\frac{5}{8}\end{array}$$