Answers

  • Brainly User
2016-06-10T07:15:50+08:00
Use the arithmetic series formula (Sum of the sequence):

S _{n} = \frac{n(n-1)}{2}

Where n = 9

S₉ = 9(9-1)
       ----------
           2

S₉ = 9 (8)
       --------
          2

S₉ = 72/2

S₉ = 36 handshakes


0
2016-06-10T10:06:48+08:00
Or, you could use a shorter statistical solution 9C2 [read as 9 choose 2] and use formula for combination or just press in a scientific calculator and get the same answer which is 36. :)
0
You're right. And if the inquirer asks why where did you get 2, it's because only two people can shake hands at at time. If more than 2 shakes hands at the same time, shall we call it "kompyang". It's a joke, please laugh :-) Welcome back :-)
HAHAHA. Nice one there. :D