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anonymous

  • 5 years ago

P(7,3) = A. 840 B. 70 C. 35 D. 210 What would the P represent again? :)

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  1. anonymous
    • 5 years ago
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    D.

  2. anonymous
    • 5 years ago
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    Do you know the permutation formula?

  3. anonymous
    • 5 years ago
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    7p3 have seven pick 3

  4. anonymous
    • 5 years ago
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    No i cant frickin remember it for the life of me!! >.<

  5. anonymous
    • 5 years ago
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    it is n!/(n-k)!

  6. anonymous
    • 5 years ago
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    plug and solve

  7. anonymous
    • 5 years ago
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    It's just like the Combination formula without any division. multiply descending values until you've written out how many numbers the digit after the P is: 7P3 = 7*6*5 (see, three numbers, descending from 7)

  8. anonymous
    • 5 years ago
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    yeah, guys, actually the answer is not D it is A the equation should be read as we have the number of permutations of 7 taken 3 at a time. so P(7,3)= "seven factorial divided by three factorial"

  9. anonymous
    • 5 years ago
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    D is correct http://www.wolframalpha.com/input/?i=permutaion%287%2C3%29

  10. anonymous
    • 5 years ago
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    bah, what would wolframalpha know :P

  11. anonymous
    • 5 years ago
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    oh i get it... did it without the difference :? guess i'll have to learn something today.

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