Question

Everything with every handshakes is
person in a room shake
with eren other person
The total no.
45
The no. of
person in the room is.​

Answer 1

Answer:

let the no. of people in room n

then by using formula

n(n-1)/2=45

n(n-1)=90

n²-n-90=0

from here u can find theroots

Step-by-step explanation:

th