The average of first six prime numbers which are between 40 and 80 is	Pick one:
A) 35.4 B) 50.7 C) 45.7 D) 57 E) 67
Explanation :   first six prime numbers which are between 40 and 80 = 41, 43, 47, 53, 59, 61   average = (41 + 43 + 47 + 53 + 59 + 61)/6   = 50.7   Answer : 50.7
<result>B</result>
The average of first six prime numbers which are between 40 and 80 is