I'll give you a question, please answer with step-by-step reasoning process.
Find the average of all the numbers between 6 and 34 which are divisible by 5.\nOptions:\n(A) 22\n(B) 20\n(C) 288\n(D) 277\n(E) 21

(B)
Average = (10 + 15 + 20 + 25 + 30)/5 = 100/5 = 20.

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Final answer: (B)