The sides AB, BC, CA of a triangle ABC have 3, 4 and 5 interior points respectively on them. The number of triangles that can be constructed using these points as vertices is
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a
205
b
210
c
315
d
216
answer is A.
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Detailed Solution
=12c3−3c3−4c3−5c3=205 The number of triangles that can be constructed using given points as vertices is 205