Respuesta :

tonb

Answer:

6

Explanation:

Assuming with triple permutations you mean permutations containing 3 elements of A:

{a,b,c} {a,b,d} {a,b,e} {a,c,d} {a,c,e} {a,d,e} {b,c,d} {b,c,e} {b,d,e} {c,d,e}

Every letter occurs 6 times.

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