Mathematics, 09.02.2021 01:00 Perdikaris
Introduction to permutations and combinations
Suppose we want to choose 2 letters, without replacement, from the 5 letters A, B, C, D, and E.
(If necessary, consult a list of formulas.)
How many ways can this be done, if the order of the choices is taken into
(a)
consideration?
Х
(b)
How many ways can this be done, if the order of the choices is not taken into
consideration
Answers: 3
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Introduction to permutations and combinations
Suppose we want to choose 2 letters, without replace...
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