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Segn la Autoridad de Acueductos y Alcantarillados la factura promedio de un hogar tpico en nuestro pas es $56.75 semanales y la desviacin estndar es

Segn la Autoridad de Acueductos y Alcantarillados la factura promedio de un hogar tpico en nuestro pas es $56.75 semanales y la desviacin estndar es $12.40. Seleccionamos una muestra de 49 facturas.

  1. Cul es la probabilidad de recibir una factura promedio entre $53 y $60 mensuales?
  2. Cul es la probabilidad de pagar menos de $58?
  3. Cul es la probabilidad de pagar entre $50 y $55?

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