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Lakshman Patel RJIT
asked
in Quantitative Aptitude
Feb 20, 2018
edited
Jun 2, 2019
by Lakshman Patel RJIT

2,212 views
11 votes

Best answer

If we choose any 2 of the 4 lines and any 2 of the 5 lines we will get a parallelogram. This way we can count all the possibilities.

$\binom{4}{2} * \binom{5}{2} = 6 * 10 = 60$

Here, the first term is the ways of choosing 2 lines out of 4 parallel lines, and the second term is for choosing 2 lines out of 5 parallel lines.

Option **(C) 60**

https://math.stackexchange.com/questions/772062/parallelograms-formed-by-parallel-lines