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[" 23.Let the sum of the first three ter...

[" 23.Let the sum of the first three terms of an A.P be "39" and the sum of its last four terms be "178" .If the first term "],[" of this AP.is "10," then the median of the A.P.is: "],[[" (1) "29.5," (2) "31," (3) "28," (4) "26.5]]

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