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[" Find "a,b,c" such that the following numbers are in "AP:a,7,b,23,c],[" Find the sum of all the "11" terms of an "AP" whose middle most term is "30" ."],[" An AP consists of "21" terms.The sum of the three terms in the middle is "129" and of the last three is "237" .Find the "]

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Find the sum of all 11 term of an AP whose middle most term in 30.

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