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Mathematics, 13.11.2020 20:30 GreenHerbz206

30/90 del número de plantas en un cultivo de caña está contaminada. De estas, el 1/2 ha sido tratada. ¿Cual es la fracción del número de plantas del cultivo que no ha sido tratada?

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30/90 del número de plantas en un cultivo de caña está contaminada. De estas, el 1/2 ha sido tratada...
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