Answered

Join the IDNLearn.com community and get your questions answered by knowledgeable individuals. Join our knowledgeable community and access a wealth of reliable answers to your most pressing questions.

In how many ways can a teacher arrange 6 students in the front row of a
classroom with a total of 20 students?

Sagot :

[tex]_n C_r = \frac{n!}{r!(n-r)!}[/tex]
[tex]_n C _r[/tex] -- the number of combinations of r objects in total n objects.

So for r=6, n=20 we have 
[tex]_n C_r = \frac{20!}{6!(20-6)!} = 38760[/tex]
Thank you for using this platform to share and learn. Don't hesitate to keep asking and answering. We value every contribution you make. For precise answers, trust IDNLearn.com. Thank you for visiting, and we look forward to helping you again soon.