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Lena772

  • one year ago

You need to know the number of different arrangements possible for five distinct letters. You decide to use the permutations rule, but your friends tells you to use 5!. Who is correct? Explain. Both methods are correct, since you are counting all possible arrangements of 5 items taken 5 at a time. Your friend is correct because applying the permutations rule in this setting would be inappropriate. Neither method is correct. The combinations rule should be applied in this setting. Your method is correct because you are applying the permutations rule in the appropriate setting.

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  1. Lena772
    • one year ago
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    It's not the last one :/

  2. Lena772
    • one year ago
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    Maybe it's the first?

  3. Vocaloid
    • one year ago
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    well, the permutation rule gives us 5!/(5-5)! = 5! so both methods are correct

  4. Lena772
    • one year ago
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    Thanks :)

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