There are a total of 12 students in Mr. Sri's gym class. Over the course of a badminton unit, each of the 12 students will compete exactly once against every other student in the class. How many total games of badminton will be played?	Select.
A) 68
B) 67
C) 69
D) 60
E) 66
there are 19 students , if each play with all other members .   then total games can be calculated as 11+10....+1 = 66.   alternate approach is to choose 2 distinct out of 12 = 12c2 = 66   Answer is 66.
<result>E</result>
There are a total of 12 students in Mr. Sri's gym class. Over the course of a badminton unit, each of the 12 students will compete exactly once against every other student in the class. How many total games of badminton will be played?