![A set of 4 parallel lines intersect with another set of 5 parallel lines](https://www.gkseries.com/blog/wp-content/uploads/2023/09/A-set-of-4-parallel-lines-intersect-with-another-set-of-5-parallel-lines.jpg)
Q. A set of 4 parallel lines intersect with another set of 5 parallel lines. How many parallelograms are formed?
(A) 20 (B) 48 (C) 60 (D) 72
Ans: 60
Sol:
Number of parallelogram
= 4C2× 5C2
=6×10
=60
Q. A set of 4 parallel lines intersect with another set of 5 parallel lines. How many parallelograms are formed?
(A) 20 (B) 48 (C) 60 (D) 72
Ans: 60
Sol:
Number of parallelogram
= 4C2× 5C2
=6×10
=60
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