Respuesta :
sea C la incognita o cant. de aves, entonces:
C-1/8C-1/4*1/8C-2/3*1/4*1/8C=672
Factor comun C: C(1-1/8-1/4*1/8-2/3*1/4*1/8)=672
C(1-1/8-1/32-1/48)=672
C(0.8229)=672
C=817 AVES.
C-1/8C-1/4*1/8C-2/3*1/4*1/8C=672
Factor comun C: C(1-1/8-1/4*1/8-2/3*1/4*1/8)=672
C(1-1/8-1/32-1/48)=672
C(0.8229)=672
C=817 AVES.