Let Sn be the sum of the first n terms of an arithmetic progression. If S3n = 3S2n, then the value of ${{{S_{4n}}} \over {{S_{2n}}}}$ is :

Question

Let S_n be the sum of the first n terms of an arithmetic progression. If S_3n = 3S_2n, then the value of ${{{S_{4n}}} \over {{S_{2n}}}}$ is :

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