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anonymous

  • 5 years ago

a relay race has a team of 4 runners who run differnet parts of the race. there are 20 students on your track squad. in how many ways can the coach select students to compete on the relay team?

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  1. anonymous
    • 5 years ago
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    if youre going to type down an answer....then yeah

  2. anonymous
    • 5 years ago
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    This looks like a straight forward permutation.20P4 ways i.e 160000 ways

  3. anonymous
    • 5 years ago
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    sorry it is 116280

  4. anonymous
    • 5 years ago
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    if its permutation it would be 116280 but if its combination it would be 4845 im not sure whether its permutation or combo

  5. anonymous
    • 5 years ago
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    it is a permutation since order does matter

  6. anonymous
    • 5 years ago
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    I calculated wrongly.20P4 = 116280 ways

  7. anonymous
    • 5 years ago
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    oh is it because it says "diff. parts of the race"

  8. anonymous
    • 5 years ago
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    Let us take one person .This same person can run in any part of the race (i.e first,second, third or fourth).So every order is important

  9. anonymous
    • 5 years ago
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    right, thanks!!!!!!!!!!!!!!

  10. anonymous
    • 5 years ago
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    by the way, I posted the answer to your other question on permutations i.e the one about selecting the editor in chief

  11. anonymous
    • 5 years ago
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    It is merely 20 * 19 * 18 * 17 = 116280

  12. anonymous
    • 5 years ago
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    thanks damdam

  13. anonymous
    • 5 years ago
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    thanks blexting

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spraguer (Moderator)
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