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virtus

  • 2 years ago

10 people are arranged around a table. A chairperson and secretary are to be elected. How many arrangements are possible such s that the chairperson and secretary are opposite each other

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  1. hba
    • 2 years ago
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    Remember that a circular permutation is (n – 1)!

  2. hba
    • 2 years ago
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    so 9!2!

  3. hba
    • 2 years ago
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    is ur ans i guess

  4. virtus
    • 2 years ago
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    answer says 7! x 8

  5. Hashir
    • 2 years ago
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    its 8!

  6. Hashir
    • 2 years ago
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    because

  7. hba
    • 2 years ago
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    ohh ok i get it now remove the 2 people (chairperson and secretary) u have total 8 left acc to circular perm 7!

  8. Hashir
    • 2 years ago
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    the Secretary and president is not to be arranged

  9. virtus
    • 2 years ago
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    OHHHH i got it they are fixed right

  10. Hashir
    • 2 years ago
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    therefore the rest can be arranged

  11. Hashir
    • 2 years ago
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    thus 8!

  12. Hashir
    • 2 years ago
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    got it dumb pants

  13. Hashir
    • 2 years ago
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    ???????

  14. virtus
    • 2 years ago
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    ya dumbpants has got it!

  15. ujjwal
    • 2 years ago
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    Suppose there is no chairperson and secretary. Now you have eight members. who can be arranged in 7! Now one among the pair of secretary and chairperson can be seated in 8 ways around the table ( the other will be just opposite). so, you have a total of 7! \(\times\) 8

  16. Hashir
    • 2 years ago
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    i m doing the same thing .... @ujjwal

  17. ujjwal
    • 2 years ago
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    yeah! great Job!! @Hashir

  18. Hashir
    • 2 years ago
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    what the hell is what ?

  19. Hashir
    • 2 years ago
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    idk

  20. hba
    • 2 years ago
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    dude u are not allowed to ask for it

  21. hba
    • 2 years ago
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    @ujjwal

  22. virtus
    • 2 years ago
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    awks.... ummm well thanks everyone!

  23. hba
    • 2 years ago
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    welcome

  24. Hashir
    • 2 years ago
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    pleasure

  25. ujjwal
    • 2 years ago
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    Great! close it now @virtus

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