Permutations And Combinations Question 349
Question: Two straight line intersect at a point O. Points $ A_1,A_2,…A _{n} $ are taken on one line and pints $ 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
Options:
A) $ n(n-1) $
B) $ n{{(n-1)}^{2}} $
C) $ n^{2}(n-1) $
D) $ n^{2}{{(n-1)}^{2}} $
Correct Answer: C
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Answer:
Solution:
BETA
