No. of square rectangle parallelogram formed when m parallel & n parallel line intersect

No.of square rectangle parallelogram when m parallel & n parallel line intersect

Assertion (A) : If 5 parallel lines intersect 4 parallel lines, then the number of parallelograms formed is 80 Reason (R) : The number of parallelograms formed when a set of m parallel lines are intersecting another set of n parallel lines is ""^(m)C_(2)xx""^(n)C_(2) The correct answer is

The number of parallelograms that can be formed from a set of 5 parallel lines intersecting another set of 4 parallel lines is

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

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

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