SAT Problem : NUMBER OF POLYGONS?

January 31, 2013 Permutation & Combination

There are 20 points of which 7 are co-linear.  How many triangles & quadrilateral can be formed?

A. 22 ,  43

B. 78,  4563

C. 79,  4355

D. 40,  4657

E. 80,  354


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