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The number of triangles that can be form...

The number of triangles that can be formed by 5 points in a line and 3 points on a parallel line is

A

`""^(8)C_(3)`

B

`""^(8)C_(3)-""^(5)C_(3)`

C

`""^(8)C_(3) -""^(5)C_(3) -1`

D

None of these

Text Solution

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The correct Answer is:
C
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[" There are "16" points in a "],[" plane,no three of which "],[" are in the same straight "],[" line except "8" of them which "],[" are in a line.The number of "],[" triangles that can be "],[" formed by joining them and "],[" which have vertices at "],[" these points is "]