Permutation and Combination

How many can straight lines be drawn from 15 non-collinear points ?

August 17, 2021 One Min Read

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How many can straight lines be drawn from 15 non-collinear points ?

A. 105

B. 120

C. 110

D. 115

E . 118

Answer : A. 105

Explanation:

Required number of lines
= nC2 = 15C2
= 15 x 14 / 2 = 105

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