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Get access to the detailed solutions to the previous years questions asked in IIM IPMAT exam
A triangle can be formed by choosing 2 points from 1 line & one point from another line
Case 1 → choosing 2 points from line with 7 points
7c2 x 5c1
= 105 triangles
Case 1 → choosing 2 points from line with 5 points
= 5c2 × 7c1
= 10 × 7
= 105 triangles
Total triangles = 105 + 70 = 175 triangles