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Mathematics, 26.01.2022 14:00 AJSkullcrusher

: En unas oposiciones, el temario consta de 90 temas. Se eligen tres temas al azar de entre los 90. Si un opositor sabe 30 de los 90 temas, ¿cuál es la probabilidad de que sepa al menos uno de los tres temas?

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