There are 10 points in a plane out of which 4 are collinear. How many lines can be drawn.

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24 Aug 2012 lines

There are 10 points in a plane out of which 4 are collinear. How many lines can be drawn.

OPtion

1) 40
2) 42
3) 45
4) 55
5) 60
6) 64
7) 68
8) 30
9) 24
10) none of these

Solution

Total no of lines (10 points) = 10*9/2 = 45
Total no of lines (4 points) = 4*3/2 = 6
so answer = 45-6+1 = 40

Correct Option: 1 Best Solution (0)