If D and F exchange their position then after the new

Solution

B sits at the middle of the row. As per this statement, the arrangement will look like this: Twopersons sit betweenCand B. Asperthisstatement,therearetwopossiblecases andthearrangementwill look like this: EisanimmediateneighbourofCandsit at the end ofthe row. H sits third from the left end of the row.As per this statement, the arrangement will look like this DisanimmediateneighbourofH. Asperthisstatement, CASEII willfurthergetsplitintoone more case and the arrangement will look like this: Case-2 NumberofpersonssittotherightofFisequalto the number ofpersonssit to theleft of H. IsitsexactlybetweenBandF. At least one person sits between G andAwho does notsitat theendoftherow. As per this statement, CASE I and CASE II will geteliminated and we will continue with CASE II (A) andthefinal arrangement will look likethis: