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Mathematics, 26.03.2020 05:05 holamigosss

Una empresa de telecomunicaciones , en el año 2018 estimo la eficacia en la solucion de reclamos de los usuarios antes de 72 horas , de la siguiente manera.
Costo de la factura: 7 de cada 20 reclamaciones fueron antes de 72 horas.
Conexion: 17 de cada 20 reclamaciones fueron solucionadas antes de 72 horas.
servivio de reparacion: 3 de cada 5 reclamaciones fueron solucionadas antes de 72 horas. La eficacia promedio aproximada de dicha empresa es del:
por fa ayudenme a resolverla , es urgente

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