CBSE Class 11-science Answered
Permutation and combinations
Asked by | 20 Mar, 2009, 10:25: AM
Expert Answer
to make a parallelogram, we need to select two of the horizontal lines and two of the transvesals.
So,
required number is
C(p,2) * C(5,2)
Answered by | 20 Mar, 2009, 12:22: PM
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