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If A={1,2,3,4,5,...,...,15}, then the s...

If ` A={1,2,3,4,5,...,...,15}`, then the sum of all products of numbers by taking two or more numbers from the set A is ` (16!-n)`. Then `[(n)/(13)]` is equal to, where `[.]` denotes G.I.F.),

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