The number of parallelograms that can be formed from a set of four parallel lines intersecting another set of three parallel lines is

(A) 6 

(B) 18 

(C) 12 

(D) 9

5 views

1 Answers

Answer is (B)

To form parallelogram we required a pair of line from a set of 4 lines and another pair of line from another set of 3 lines.

Required number of parallelograms = 4C2 x 3C2 = 6×3 = 18

5 views