Question

PLEASE EXPLAIN THIS! :(
At the end of a meeting all participants shook hands with each other. 28 handshakes were exchanged. How many people were in the meeting?

Answer 1

if there was one person there'd b no handshakes, if there were 2 there'd be 2, if there were 3 there'd x be so it follows a pattern similar to (n+1) write the formula and find the solution

Answer 2

if there were 2 there'd be 1*

Answer 3

I didn't get it. :(

Answer 4

Also writing a picture could be helpful in finding the formula