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1/5 = 4 rojas.
1/4 = 5 azules.
1/10 = 2 amarillas
3 verdes
3/10 = 6 negras.
Salu2
+ Azules = 1/4 (20) = 5
+ Amarillas = 1/10 (20) = 2
+ Verdes = 3
+ Negras = 20 - (4+ 5 + 2 + 3) = 20 - 14 = 6
* Respuesta:
- La fracciónde canicas Negras es 6/20 =3/10