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Let A1,A2,A3 ...,An are the vertices of...

Let `A_1,A_2,A_3 ...,A_n` are the vertices of a polygon ofnsides. If the number of pentagons that can beconstructed by joining these vertices such that none of the side of the polygon is also the side ofthe pentagon is 36, then the value of 'n' is :

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