Ask
your own question, for FREE!
Mathematics
56 Online
For a segment of a radio show a DJ can play 9 records. If there are 12 records to select from, in how many ways can the program for this segment be arranged.
Still Need Help?
Join the QuestionCove community and study together with friends!
See, we choose 9 from 12, so it'd be 12 choose 9 aka 12c9.
Do you know what combinations are?
This is similar to the last problem There are 12 choices for the first slot There are 11 choices for the second slot etc etc until you get to 3 choices for the 9th slot
Basically, nCr is: \(\Large \color{MidnightBlue}{\Rightarrow {n! \over (n - r)! r!} }\)
yes its sure been a while since i dont problems like this. thanks for the replys.
Still Need Help?
Join the QuestionCove community and study together with friends!
what do i multipy thats whats throwing me off
\[ \large \binom{12} 9 = \binom{12} 3= 220 \]
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!
Join our real-time social learning platform and learn together with your friends!
Latest Questions
Sk4llsNB0n3s:
I need tips on how to improve my poems and lyrics. Here's one poem to see if I need any pointers: This poem is called Fall: We walked down the beach When it
October4:
u201cYou Left Me With the Skyu201d You tore the sky in half that night, and left me staring at the wound.
gelphielvr:
Does anyone know how electron configuration works? I need a good explanation pls
Taku12:
idk how to feel about my shading on a project I'm doing in art is it good?
75:
How to convince your teacher you didn't use ai but they wont believe you?
xXAikoXx:
What's the difference between ethnicity and race? (I GENUINELY do NOT understand the difference.
21 hours ago
0 Replies
0 Medals
4 hours ago
11 Replies
0 Medals
17 hours ago
4 Replies
1 Medal
23 hours ago
16 Replies
1 Medal
1 day ago
4 Replies
2 Medals
1 day ago
3 Replies
1 Medal