Question

I REALLY NEED YOUR HELP

Answer 1

n(n-1)/2 is the formula

Explanation:

n(n-1) divided by 2 is the formula

with this you can solve any questions like this

for example you have 6 person so,

n(n-1)/2

6(6-1)/2

6(5)/2

30/2

there will be 15 handshakes