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Problem
Problem
There are
2
n
2n
2
n
points in a plane in which
m
m
m
are collinear (
m
>
4
m > 4
m
>
4
). Number of quadrilateral formed by joining these lines a. is equal to
2
n
C
4
−
m
C
4
{}^{2n}C_4 - {}^mC_4
2
n
C
4
−
m
C
4
b. is greater than
2
n
C
4
−
m
C
4
{}^{2n}C_4 - {}^mC_4
2
n
C
4
−
m
C
4
c. is less than
2
n
C
4
−
m
C
4
{}^{2n}C_4 - {}^mC_4
2
n
C
4
−
m
C
4
d. None of these
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