Ask your own question, for FREE!
Mathematics 13 Online
OpenStudy (anonymous):

A locker contains 13 books. You select 5 books at random. How many different books can you select?

OpenStudy (luigi0210):

\[\frac{ n! }{ r!(n-r)! }\]

OpenStudy (anonymous):

|dw:1369624997960:dw|

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!