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Discos de policarbonato de plsticos son analizados para resistencia a rayazos y golpes los datos se resumen en la siguiente tabla. Resistencia a Rayazos Resistencia

Discos de policarbonato de plsticos son analizados para resistencia a rayazos y golpes los datos se resumen en la siguiente tabla.

Resistencia a Rayazos Resistencia a golpes
Alta Baja
Alta 70 9
Baja 16 5
  1. Si se selecciona un disco al azar, cul es la probabilidad que tenga alta resistencia a rayazos y tambin alta resistencia a golpes?
  2. Si se selecciona un disco al azar, cul es la probabilidad que tenga alta resistencia a rayazos o alta resistencia a golpes?
  3. Considere los eventos alta resistencia a rayazos y tambin alta resistencia a golpes. Son eventos mutuamente excluyentes.

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