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

1 answer:

8 0

This is a combination of 20 studants, 6 to 6:

$C_{2,6}=\frac{20!}{(20-6)!6!}=\frac{20!}{14!6!}=\frac{20.19.18.17.16.15.14!}{14!.6.5.4.3.2.1}=38,760 \ ways$

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Ganezh [65]

Answer:

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Step-by-step explanation:

$Greetings!$

$I'm~Isabelle~Williams~and~will~be~answering~your~question!$

$(\frac{2}{5}p+p )=5 ~~~~~(Combine ~the~like~terms)$

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$(\frac{5}{7} )\times(\frac{7}{5}p )=(\frac{5}{7} )\times(5)$

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