mathmath333
  • mathmath333
counting problem
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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mathmath333
  • mathmath333
que:- In how many ways can 4 red, 3 yellow and 2 green discs be arranged in a row if the discs of the same colour are indistinguishable ?
anonymous
  • anonymous
4 x 3x 2
anonymous
  • anonymous
so 24

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anonymous
  • anonymous
wait!!!!!!!!
mathmath333
  • mathmath333
lol no answer is 1260
anonymous
  • anonymous
i knew it!!!!!!
anonymous
  • anonymous
it didnt seem right lol
anonymous
  • anonymous
how did u get that lol?
anonymous
  • anonymous
@mathmath333
mathmath333
  • mathmath333
from back of the book
anonymous
  • anonymous
lmao wow
anonymous
  • anonymous
so u dont know how to do it?
mathmath333
  • mathmath333
yep
anonymous
  • anonymous
u do or dont?
anonymous
  • anonymous
lol this dude bocked me cause i fanned him
mathmath333
  • mathmath333
i am also struggling to understand the meaning of sentence "arranged in a row if the discs of the same colour are indistinguishable"
geerky42
  • geerky42
This means you can't tell the difference between two discs of same color, so saying we have #1 green disc and #2 green disc. 1 2 in order is same as 2 1. As in there is only one way to arrange #1 and #2 disc.
mathmath333
  • mathmath333
ok i see the key meaning
IrishBoy123
  • IrishBoy123
4 red, 3 yellow and 2 green that's \(\large \frac{9!}{4! \ 3! \ 2!} \)
mathmath333
  • mathmath333
that equals 1260
mathmath333
  • mathmath333
thnx

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