The average of first thirteen prime numbers which are odd is?	Choose the correct choice
A) 20.15
B) 21.15
C) 22.15
D) 23.15
E) 24.15
Explanation:   Sum of first 13 prime no. which are odd = 275   Average = 275/13 = 21.15   Answer:21.15
<result>B</result>
The average of first thirteen prime numbers which are odd is?