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[" Ar.There are "n" A.M's between "3" an...

[" Ar.There are "n" A.M's between "3" and "54" ,such that the "8" th meani "(n-2)" " mean."3" : "5" .The value of "],[[" (A) "12," (8) "16," (D) "20," 18"]]

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