In a BCCI meeting there are 12 people. All shake hands with each other once. How many handshakes will be there altogether?	Options:
A) 28 B) 11 C) 12 D) 19 E) 18
There will be n-1 handshakes as A person will shake hands with all the other members.   =12-1= 
<gadget id="calculator">12-1</gadget>
<output>11</output>
11   Answer:11
<result>B</result>
In a BCCI meeting there are 12 people. All shake hands with each other once. How many handshakes will be there altogether?