1.

Let x1 x2 x3 x4 x5 x6 be a six digit number.The number of such numbers ifx1<x2<x3<x4<x5<x6 is

Answer»

Let x1 x2 x3 x4 x5 x6 be a six digit number.The number of such numbers if

x1<x2<x3<x4<x5<x6 is



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