3 people meet for a business lunch. Each person shakes hands once with each other person present. How many handshakes take place?
Pick one.
A) 10 B) 15 C) 3 D) 9 E) 12
the formula to count handshakes is n(n−1)2n(n−1)2   Where n is the number of people   =&gt; 3(3-1)/2 = 3*2/2 = 6/2= 
<gadget id="calculator">6/2</gadget>
<output>3</output>
3=&gt; the answer is 3(3)
<result>C</result>
3 people meet for a business lunch. Each person shakes hands once with each other person present. How many handshakes take place?