Question

3.
Every body in a room shakes hands with
every body else. The total number of hand shakes
is 66. The total number of persons in the room​

Answer 1

Answer:

12

Step-by-step explanation:

We can understand the situation as following.

Let the people in the room be A, B, C

If A shakes hands with each, the total handshakes would be total 2

If B does the same the number would by total 1 . This is because A and B have already shaken hands.

And C need not shake hands with anyone, and total handshakes = 1+2 =3

Similarly,

1+2+3+4+5+6+7+8+9+10+11 = 66.

Therefore total number of people = 12

Answer 2

hope it helps...

PLZ MARK BRINLIEST