How many parallelograms are formed by a set of 6 parallel lines intersecting another set of 4 parallel lines?
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Explanation:
this is the question of premutations and combinations.for a parallelogram you need 2 pairs of parallel lines. so we can choose the any two lines from the first set of 4 parallel lines and choose only any two lines from the second set of 5 parallel lines and parallelograms are formed
hope this will help you!!!
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