Ateam of 12 technicians is in a meeting. at the end of the meeting each person gives each other a high five. how many high fives are given

If n technicians give high five to all the other technicians, then the number of high fives each technician gives is (n-1), but each time a technician gives a high five, the other, the receiver of the action, also gives a high five; therefore the number of high fives will be: 
Where n is the number of technicians.

Now, we can substitute the value to get out


We can conclude that at the end of the meeting 66 high fives were given.

Iagree that is the answer to the question