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

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

(a) 6 

(b) 9 

(c) 12 

(d) 18

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(d) 18

Number of parallelograms = 4C2 × 3C2 

= 6 × 3 = 18

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