Find an eighth grade math problem (average)

Hello, the answer should be D.

A 1 plus A2...A5 = 5A

The extra 0 is A 1 plus A2 plus A3 plus 0 ... plus A5 divided by 6.

A 1 plus A2 plus A3 is not plus 0 ... plus A5 equals =5A plus 0? So what the question asks you is how much is 5A plus 0 divided by 6, which naturally equals 5A of 6.

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