anonymous
  • anonymous
A science class must choose 5 out of 16 science fair projects to advance to the county competition. How many different groups of projects could be selected?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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amistre64
  • amistre64
16 chances on the first pick 15 on the second pick 14, then 13 then 12 ... then its full
amistre64
  • amistre64
but, that counts abc as different from bca
amistre64
  • amistre64
to weed out the repeats since groups dont care about order we can divide that by 5!

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amistre64
  • amistre64
16P5 ----- = 16C5 5!
anonymous
  • anonymous
and that equals??
amistre64
  • amistre64
you should have material that explains the notation better than I can
anonymous
  • anonymous
ok. then whats the final anseer?
anonymous
  • anonymous
\[\dbinom{16}{5}\] but that doesn't answer the question, it just restates it in notation

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