leidysantiago leidysantiago

24-02-2021
Mathematics

contestada

9. Con 12 libros de diferentes autores, cuántas selecciones de 7 libros se pueden

hacer si:

a. Un libro determinado se incluye siempre.

b. Un libro determinado nunca se incluye.

Respuesta :

hprokopiou33 hprokopiou33

24-02-2021

answer is 14 because 3x4 is 12 +2 = 14

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