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Suppose we want to choose 5 letters, without replacement, from 9 distinct letters.(a) How many ways can this be done, if the order of the

Suppose we want to choose 5 letters, without replacement, from 9 distinct letters.(a) How many ways can this be done, if the order of the choices is not taken into consideration?(b) How many ways can this be done, if the order of the choices is taken into consideration?

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