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Probability
Permutations and combinations: Problem type 1
15
Espaniol
Suppose we want to choose 5 letters, without replacement, from 18 distinct letters.
(If necessary, consult a list of formulas.)
(a) If the order of the choices is taken into consideration, how many ways can this be done?
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(b) If the order of the choices is not taken into consideration, how many ways can this be done?
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