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Answer on Analytic Geometry Question for maria pretty maths

Question #5428
salam sir please help me by providing the answer of below question.
how many triangles can be formed by joining 12 points ,7 of which lies on the same straight line.
Expert's answer
We can make C(12,3) different combinations of these points, but C(7,3) of them will not create triangle. So, there can be formed C(12,3) - C(7,3) = 220 - 35 = 185 triangles.

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Comments

Assignment Expert
02.12.2011 08:08

You are welcome

maria pretty
02.12.2011 01:00

thank you sir very much.

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