There are, in a certain league, 10 teams, and each team face another team for a total of 10 times. How many games are played in the season? Select:
A) 1000
B) 450
C) 720
D) 180
E) 400
By using the formula, t[n(n - 1) / 2], where t = no. of games between two teams and n = total no. of teams, we get: 450   Option 1000.
<result>A</result>
There are, in a certain league, 10 teams, and each team face another team for a total of 10 times. How many games are played in the season?