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The number of triangles that can be form...

The number of triangles that can be formed with 10 points as vertices, n of them being collinear, is 110 then n is

A

2

B

3

C

4

D

5

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The correct Answer is:
D
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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-EXERCISE-II
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  2. There are two parallel lines, one having 10 points and the other havin...

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  3. The number of triangles that can be formed with 10 points as vertices,...

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  4. A regular polygon of n sides is constructed. No. of ways 3 vertices be...

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  5. The number of triangle whose vertices are at the vertices of an ...

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  6. The maximum number of points of intersection of 8 circles is

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  9. Number of ways of selecting two squares having common side in a chess ...

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  10. Number of unit squares in a chess board is

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  11. In a plane there are two families of lines y = x+c, y=-x+c where ce{0,...

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  12. In a book-stall, there are 4 copies of one book, 5 copies of another a...

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  15. There are 10 lamps in a hall. Each one of them can be switched on inde...

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  16. A question paper has 5 questions. Each question has an alternative. Th...

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  17. Given 5 different green dyes, 4 different blue dyes, 3 different red d...

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  18. For any integer nge1, the number of positive divisors of n is denoted ...

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  19. Number of non-trivial divisors of 1512 is

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  20. Number of even divisors of 1600 is

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