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The number of ways can 11 persons sit ar...

The number of ways can 11 persons sit around a table so that all shall not have the same neighbours in any two arrangements is

A

`10!`

B

`(10!)/(2)`

C

`(11!)/(2)`

D

`11!`

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The correct Answer is:
B
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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-EXERCISE-I
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  3. The number of ways can 11 persons sit around a table so that all shall...

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  5. The number of circular permutations of 8 things taken 4 at a time in b...

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  6. Number of necklaces of 8 beads each can be made from 15 beads of vario...

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  7. The sum of all the numbers formed by taking all the digits from 2, 3, ...

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  8. The sum of all the numbers formed by taking all the digits from 2, 3, ...

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  10. The number of ways in which four letters can be put in four addressed ...

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  11. The positive integer r, such that ""^(15)C(3r)=""^(15)C(r+3) is equal ...

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  12. n and r integers such that 1lerlen, then n. ""^(n-1)C(r-1) is

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  13. If ""^(n)C(3)=10, then n is

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  14. If ""^(n)C(r) denotes the number of combinations of n things taken r t...

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  15. If ""^(8)C(3)+""^((n+2))C(4)=""^(9)C(4), then n is

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  16. IF C (2n, 3) : C (n,2) = 12 : 1, then n=

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  17. The number of ways in which a team of 6 players can be chosen from 11 ...

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  18. The number of diagonals in a polygon of 10 sides is

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  19. If these are 8 points on a circle, then number of different line seg...

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  20. If these are 8 points on a circle, Number of triangles formed by joi...

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