There are 10 points in the plane, of which 5 points are collinear and no three among the remaining are collinear. Then the number of distinct straight lines that can be formed out of these 10 points is
Explanation:
Total number of lines that can be formed using 10 points = 10C2 = 45 lines.
But out of these 10, 5 points are collinear and hence will give only 1 line instead of 10C2 = 10.
∴ Number of unique lines = 45 - 10 + 1 = 36.
Hence, option (d).
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