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Friends Meet.

Discussion in 'Online Games & Puzzles' started by ksuji, Jul 6, 2020.

  1. ksuji

    ksuji Gold IL'ite

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    10 friends meet at a place for some discussion.

    First of all they shake their hands with each other.

    If Mr.A shakes his hand with Mr. B it is counted as one handshake. Again Mr.B shakes his hand with Mr.A will not occur , that is, it does not repeat with the pair A and B .

    Totally how many handshakes occur among the 10 friends ?
     
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  2. sociallifein30s

    sociallifein30s Silver IL'ite

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    (10-1)!?
    that is 9 factorial?

    and a good chance of covid
     
  3. SunPa

    SunPa Platinum IL'ite

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    45?
    And definitely this :-D
     
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