In a party attended by 12 persons, each clinch their glass with every other. How many glass clinches? Select the correct option.
A) 51	B) 52	C) 53	D) 66	E) 55
Total no. of person = 12   Total no. of glass clinches = n(n-1)/2   =12*11/2= 
<gadget id="calculator">12*11/2</gadget>
<output>66</output>
66   ANSWER:66
<result>D</result>
In a party attended by 12 persons, each clinch their glass with every other. How many glass clinches?