trunefan4379 trunefan4379
  • 03-09-2017
  • Mathematics
contestada

If 23 people shake each others hands once how many hands are shook in all

Respuesta :

Аноним Аноним
  • 03-09-2017
This is the number of combinations of 2 from 23
 23C2   = 23! / 2! 21!

A quick way to do this   is  23*22 / 2   =   253
Answer Link

Otras preguntas

Which of the following statements best describes the formation of volcanoes?
Which of the following statements best describes the formation of volcanoes?
1+0.9+0.08+0.001 Somebody can help me please
the answer is 20/13 you can simplify the answer.
Omar has $660 to spend at a bicycle store for some new gear and biking outfits. Assume all prices listed include tax. He buys a new bicycle for $330.64. He buys
Rahi is pouring concrete to create the foundation of a square deck covering 112 square feet. Which is the best estimate of one side of the deck? Round to the ne
What is the slope of the line passing through the points (2,-5) and (4, 1)? A 5/4B 3 C 2 D -4/5​
y = -x + 3 2y + 2x = 4
desparte in silabe cuvintele date apoi incercuieste diftongii marcand semivocalele cu semnuls pecific
Something times 3=-180