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Tm denotes the number of triangles t...

`T_m` denotes the number of triangles that can be formed with the vertices of a regular polygon of m sides . If `T_(m+1)- T_m=15` then m=

A

3

B

6

C

9

D

12

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The correct Answer is:
B
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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-EXERCISE-II
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  2. IF T(n) dentoes the number of triangle formed with n points in ...

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  3. Tm denotes the number of triangles that can be formed with the ...

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  4. There are two parallel lines, one having 10 points and the other havin...

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

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

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

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

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  9. The maximum number of points of intersection of 4 circles and 4 straig...

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  10. A regular polygon has 23 vertices and consequently 23 sides. The numbe...

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

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  12. Number of unit squares in a chess board is

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

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

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  15. the number of products that can be formed with 10 prime numbers ...

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  16. In the intermediate examination a candidate has to pass in each ...

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

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

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

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

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