1. How do you determine if a situation involves combinations? 2. To find the total number of polygons that can be formed from seven points on a plane with no three of which are collinear, Joyce answered. 71 C(7, 3) = 4! 31 7-6-5 4 43! 7-8-5 %3D 3-2-1 = 35 different polygons Is Joy correct? Justify your answer? KASY

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