Find the number of possible line segments from 8 points such that no three points are collinear. Draw a diagram to show
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Step-by-step explanation:no of lines when no three points are collinear.
if we have n points, then the number of lines will be the number of ways of choosing 2 points out of n points. and in this type of choosing questions, we use the combination method of permutation and combination topic
the formula for combination for choosing r points out of n is = nCr = (n!)/(n-r)!r!
where n! = n x (n-1) x (n-2) ......... 2 x 1
here n=10 and r=2
nCr = 10C2 = 10! / (8!)(2!)
10 x 9 x 8!/2 x 8!
10 x 9/2
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