The number of parallelograms that can be formed from a set of four par

1.	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
Answer» 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

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

Answer»

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