Questions
The number of triangles that can be formed by 5 points in a line and 3 points on a parallel Iine is
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a
8C3
b
8C3−5C3
c
8C3−5C3−1
d
None of these
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Correct option is C
The triangle will be formed by joining any three non-collinear points.Required number of ways =8C3−5C3−3C3=8C3−5C3−1Similar Questions
There arepoints in a plane, no two of which are in a straight line except 4, all of which are in a straight line. The number of triangles that can be formed by using these points is
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