Question

If each of 4 persons shakes hands with each of the other persons, how many handshakes would take place?

A 3
B. 4
C.6
D. 12
E. 24

Answer 1

6

Explanation:

The formula for n persons is:

`(n(n-1))/(2)`

So for 4 persons it is 4*3/2 = 6