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: Select the correct option:
A) 16  B) 17  C) 18  D) 19  E) 14
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.   OPTION:18
<result>C</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: