If 10 boys meet at a reunion and each boy shakes hands exactly once with each of the others, then what is the total number of handshakes	Choose the most appropriate option:
A) 41
B) 42
C) 43
D) 44
E) 45
n(n-1)/2 =10*9/2= 
<gadget id="calculator">10*9/2</gadget>
<output>45</output>
45   ANSW45R:45
<result>E</result>
If 10 boys meet at a reunion and each boy shakes hands exactly once with each of the others, then what is the total number of handshakes