7 teams compete in a track competition. If there are 20 events in the competition no event ends in a tie, and no team wins more than 3 events, what is the minimum possible number of teams that won at least one event?
a. 3
b. 4
c. 5
d. 6
e. 7
Annswer is 7
a. 3
b. 4
c. 5
d. 6
e. 7
Annswer is 7
