Mathematics · Permutations and Combinations
There are m points on one straight line AB and n points on another straight line AC, none of them being the point A itself. How many triangles can be formed with these points as vertices?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1mn(m + n - 1)
- 212mn(m + n - 1)
- 312mn(m + n - 2)✓
- 4mn(m + n - 2)
Correct answer
12mn(m + n - 2)
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