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The number of triangle whose vertices...

The number of triangle whose vertices are at the vertices of an octagon but none of whose sides happen to come from the sides of the octagon is

A

24

B

52

C

48

D

16

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The correct Answer is:
D
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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-EXERCISE-II
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  2. A regular polygon of n sides is constructed. No. of ways 3 vertices be...

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

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

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

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

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

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  8. Number of unit squares in a chess board is

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

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

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

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

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

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

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

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

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  17. Number of non-trivial divisors of 1512 is

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  18. Number of even divisors of 1600 is

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  19. If N denotes the set of all positive integers and if : NtoN is defined...

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  20. The sum of the even divisors of 168 is

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