There are 20 people in a room. If each person shakes hands with exactly 3 other people, what is the total number of handshakes?
Choose the correct option.
A) 20
B) 25
C) 30
D) 45
E) 60
Note that each handshake includes two people.   The total number of handshakes is  20*3/2= 
<gadget id="calculator"> 20*3/2</gadget>
<output>30</output>
30   The answer is 30.
<result>C</result>
There are 20 people in a room. If each person shakes hands with exactly 3 other people, what is the total number of handshakes?