Find the average of the first four prime numbers greater than10

A.
20 
B.
19 
C.
17 
D.
15
Correct Answer: Option D
Explanation
First four prime numbers greater than 10 are 11, 13, 17, 19
The average (= frac{11+13+17+19}{4}=15)
First four prime numbers greater than 10 are 11, 13, 17, 19
The average (= frac{11+13+17+19}{4}=15)