0967518904s 0967518904s
  • 21-01-2024
  • Mathematics
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E. M. En una empresa en donde trabajan 18 extranjeras se sabe que 15 hablan alemán, 14 hablan francés, 12 hablan castellano, 9 hablan alemán y castellano, 8 hablan francés y castellano. ¿Cuántas hablan alemán y francés, pero no castellano, si todas hablan al menos uno de los idiomas mencionados? 6 ​

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