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Two straight lines intersects at a point O. Points A_1, A_2,..

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Two straight lines intersects at a point O. Points $A_{1}, A_{2}, .... A_{n}$ are taken on one line and $B_{1}, B_{2}, .... B_{n}$ on the other. If the point O is not to be used, the number of triangles that can be drawn using these points as vertices, is:

n (n - 1)

n (n - 1)^{2}

n^{2} (n - 1)

n^{2} (n - 1)^{2}

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Amelia Discussed

Two straight lines intersects at a point O. Points

A_{1}, A_{2}, .... A_{n}

are taken on one line and

B_{1}, B_{2}, .... B_{n}

on the other. If the point O is not to be used, the number of triangles that can be drawn using these points as vertices, is:

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Question Text

Two straight lines intersects at a point O. Points

A_{1}, A_{2}, .... A_{n}

are taken on one line and

B_{1}, B_{2}, .... B_{n}

on the other. If the point O is not to be used, the number of triangles that can be drawn using these points as vertices, is:

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