Question

If 30person handshake with each other.then how many handshake happen​

Answer 1

Answer:

435

Step-by-step explanation:

It would be 435 handshakes.

Think of it this way: Student 1 individually goes around to the other 29 students and gives them all a handshake. Then, Student 2 does the same, except he’s already shaken the hand of Student 1, so he doesn’t shake his hand, leaving this time 28 handshakes. This process repeats until all students have shaken the hands of all other students.

This can be written as:

29 + 28 + 27 +26 ….+3 +2 +1

Answer 2

Step-by-step explanation:

1 person = 29 handshakes

30 person = x handshakes

1/29 = 30/x

x = 30 × 29

x= 870 handshakes