SOLUTION: the number of distinct lines that can b formed by joining 20 points on a plane of which no 3 points are collinear
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Question 891444: the number of distinct lines that can b formed by joining 20 points on a plane of which no 3 points are collinear Answer by AnlytcPhil(1806) (Show Source):
Since line segment AB is the same as line segment BA, order does not matter,
so we use combinations. We have:
20 points CHOOSE 2 or C(20,2) = 190
Edwin
