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The number of ways in which a couple can...

The number of ways in which a couple can sit with 10 guests in a row if the couple takes consecutive seats is

A

12!

B

`12!xx2!`

C

10!

D

`11!xx2!`

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The correct Answer is:
D
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NEW JOYTHI PUBLICATION-PERMUTATIONS AND COMBINATIONS-EXERCISE
  1. The total number of 5 digit numbers formed using the digits 1, 2, 3, 4...

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  2. The total number of 5 digit numbers formed using the digits 2, 4, 6, 7...

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  3. The number of ways in which a couple can sit with 10 guests in a row i...

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  4. The number of ways in which 7 boys and 3 girls may be arranged in a ro...

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  5. The number of ways in which a 7 people can sit around a round table is

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  6. The number of ways in which 7 people can sit around a table if two per...

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  7. C (18, r) = C (18, r + 2). Then C(r, 5) =

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  8. C(13,5)=

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  9. C(13,4)=

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  10. C(10,9)=

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  11. C(15,12)=

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  12. The number of ways of selecting 6 objects from eight objects is

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  13. The total number of ways of selecting 3 balls from a bag containing 7 ...

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  14. The total number of ways of selecting a team of 3 men and 4 women from...

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  15. The value of ""^(n)P(1)+(""^(n)P(2))/(2!)+(""^(n)P(3))/(3!)+......+(""...

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  16. The number of ways of selecting 3 objects from eight object is

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  17. A candidate is required to answer 7 questions out of 12 questions, whi...

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

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  19. A polygon has 77 diagonals. The number of sides of the polygon is

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  20. If a set of m paralled lines intersect another set of n parallel lines...

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