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If a set of m paralled lines intersect a...

If a set of m paralled lines intersect another set of n parallel lines (not parallelto the
lines in the first set), then find the number of parallelograms fromed in this lattice structure.

A

`""^(n)C_(2)xx""^(n)C_(2)`

B

`""^(n+1)C_(2)xx""^(n+1)C_(2)`

C

`""^(n)C_(2)xx""^(n+1)C_(2)`

D

`""^(n+2)C_(2)xx""^(n+2)C_(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
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