The average of first four prime numbers greater than 10 is?
Select the correct option
A) 10
B) 20
C) 15
D) 40
E) 50
11 + 13 + 17 + 19= 
<gadget id="calculator">11 + 13 + 17 + 19</gadget>
<output>60</output>
60/4= 
<gadget id="calculator">60/4</gadget>
<output>15</output>
15   ANSWER:15
<result>C</result>
The average of first four prime numbers greater than 10 is?