Find the average of all the numbers between 6 and 30 which are divisible by 4.
Choose the correct choice from the following choices
A) 15 B) 18 C) 20 D) 22 E) none

Rationale: "sol . average = ( 8 + 12 + 16 + 20 + 24 + 28 / 6 ) = 108 / 6 = 18 answer b"
Answer: B