In a hockey championship, there are 153 matches played. Every two team played one match with each other. The number of teams participating in the championship is:	Choices
A) 18
B) 24
C) 13
D) 29
E) 17
Let there were x teams participating in the games, then total number of matches,   nC2 = 153.   On solving we get,   =&gt; n =−17 and n =18.   It cannot be negative so,   n = 18 is the answer   18ns: 18
<result>A</result>
In a hockey championship, there are 153 matches played. Every two team played one match with each other. The number of teams participating in the championship is: