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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