Question

In a football championship, 1326 matched we're played.Every 2 team played 1 match with each other. How many tea ms participate in this championship??​

Answer 1

Step-by-step explanation:

Let there were x teams participating in the games, then total number of matches,

nC2 = 153.

On solving we get,

=> n =−17 and n =18.

It cannot be negative so,

n = 18 is the answer.