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

how does the author's purpose affect his or her rhetorical choices
What was the music in 1776?
Which feature is found in prokaryotic cells but not in eukaryotic cells? A. cytoplasm B. nucleoid C. nucleus D. plasma membrane
How does your body adapt surface area-to-volume ratios to help exchange gases?
Help me on trigonometry please
European imperialism did all of the following except
what is the value of the 5 in a diameter of a half dollar?
what is 5.7×95 and please tell me the right answer
How did the Catholic Church respond to the Protestant reformation? A. The pope called for a meeting of all church leaders B. Church leaders ignored complaints
Which type of activity should be done alongside flexibility exercises? mental strength-building low-intensity baseline