Suppose we want to choose 5 letters, without replacement, from 18 distinct letters. (a) How many ways can this be done, if the

Question

Suppose we want to choose 5 letters, without replacement, from 18 distinct letters.
(a) How many ways can this be done, if the order of the choices is not relevant?
(b) How many ways can this be done, if the order of the choices is relevant?

Kunduz · Accepted Answer

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