anonymous
  • anonymous
you want to determine the average age of students sitting in a classroom, so you decide to take a random sample of five students. If there are thirty students sitting in class, how many different samples are possible?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
is this a permutation or a combination?>
hartnn
  • hartnn
does the order matter or not?
anonymous
  • anonymous
I dont thikn so

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hartnn
  • hartnn
correct, it doesn't so combination
anonymous
  • anonymous
just checked my notes.. ok..
anonymous
  • anonymous
so then I just need to work out which is n C r n or r... does it matter which is which?
anonymous
  • anonymous
Im getting 142506
hartnn
  • hartnn
n is always greater than or = r
anonymous
  • anonymous
as combin(30,5) I think the sample size goes 2nd ?
anonymous
  • anonymous
ok so the larger size goes as n
hartnn
  • hartnn
correct, 30 C 5
anonymous
  • anonymous
ah, intersting.. I just noticed that combin function fails if n
imqwerty
  • imqwerty
yea :) 30C5 is correct
anonymous
  • anonymous
well then, I think 142506 is the answer :)
anonymous
  • anonymous
thanks hartnn
hartnn
  • hartnn
yes, because you can't choose 30 people from available 5 people! :P
hartnn
  • hartnn
142506 is correct :)

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