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Mathematics 15 Online
OpenStudy (anonymous):

There are 16 students who choose up sides to play soccer. How many different teams of 8 can be formed?

OpenStudy (anonymous):

Pretty sure it's \[\left(\begin{matrix}16 \\ 8\end{matrix}\right)\] This is because order is not important. The same team could be made by choosing students in a different order.

OpenStudy (anonymous):

answers right here

OpenStudy (anonymous):

12870 120 40320 720

OpenStudy (anonymous):

12870. But do you understand why?

OpenStudy (anonymous):

no not really

OpenStudy (anonymous):

Have you learned combinations? Like:

OpenStudy (anonymous):

yea i learned them silly

OpenStudy (anonymous):

haha ok.So what part is tripping you up?

OpenStudy (anonymous):

Just approaching the question?

OpenStudy (anonymous):

i think lol i dunno

OpenStudy (anonymous):

Well one way people refer to combinations is like "16 choose 8". And sometimes it's written as 16C8. So 16 students for a team of 8: "16 choose 8". Just remember that in this situation order is not important. Unlike the question you had earlier where you needed to find the number of possible words.

OpenStudy (anonymous):

this lesson we are learning in class the teacher is not exsplaining it in depth enough for us to understand most of the students got a 30% on the 1st test cause we didn't know anything he threw at us so yea its hard for me to understand it

OpenStudy (anonymous):

That's unfortunate. But good for you for coming here and taking taking ownership of your education.

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