The average of first six prime numbers which are between 30 and 70 is	Options.
A) 35.4	B) 42	C) 45.7	D) 57	E) 67
Explanation :   first six prime numbers which are between 30 and 70 = 31, 37, 41, 43, 47, 53   average = (31 + 37 +41 + 43 + 47 + 53)/6= 
<gadget id="calculator">(31 + 37 +41 + 43 + 47 + 53)/6</gadget>
<output>42</output>
42   Answer : 42
<result>B</result>
The average of first six prime numbers which are between 30 and 70 is