5 basketball teams play each other once. How many games are played?
AB AC AD AE
BC BD BE
CD CE
DE
= 10 games
5 / 1 = 5
hmm...like "help" said- do you have multiple choice?
20
Any multiple choices?
I would say 10 games
I agree with @Help
number of games
= C(5,2)
= 10
just confirming the answer with concept of combinations.