when do concepts of permutation and combination apply?
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when do concepts of permutation and combination apply?
when do concepts of permutation and combination apply?
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Answer:
Permutations are for lists (order matters) and combinations are for groups (order doesn't matter). You know, a "combination lock" should really be called a "permutation lock". The order you put the numbers in matters. A true "combination lock" would accept both 10-17-23 and 23-17-10 as correct.