document.write( "Question 1116296: Suppose that there are 10 people at the head table for a banquet. Each time a toast is given the 10 people raise their glasses in a toast and every person pings glasses exactly once with everyone else. If four people give toasts before the meal, how many pings will there be at the head table? \n" ); document.write( "

Algebra.Com's Answer #731184 by ikleyn(52781) $\"\"$ $\"About$

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document.write( " = 45 pings after each tost.\r\n" );
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document.write( "In all, there were 45*4 = 180 pings after 4 toasts.\r\n" );
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