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{:("List-I","List-II"),((P)"A geometirc ...

`{:("List-I","List-II"),((P)"A geometirc progression consists of an even" ,(1)7),("number of terms. if the sum of all the terms is",),("then its common ratio is",),((Q)Let S_(n).S_(2n).S_(3n)"be the sums of first n.2n.3n",(2)4),((n in N)"terms of an arithmetic progression then",),((S_(3n))/(S_(2n)-S_(n)) "is equal to",),((R)"Number of ordered pairs (a.b)where a.b" in N,(3)3),("such that" 6.a.b ("taken in that order") "are in harmonic progression is equal to",):}`

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