Número de formas de extraer 2 fichas moradas de 5:
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- Pregunta: Hay 3 fichas naranjas, 5 fichas moradas y 4 fichas plateadas en una bolsa. Si se extraen dos fichas al azar sin reemplazo, ¿cuál es la probabilidad de que ambas sean moradas?
- Solución: Calcula la probabilidad paso a paso.
- Número total de fichas: \( 3 + 5 + 4 = 12 \)
- \binom{5}{2} = 10
- Número total de formas de extraer 2 fichas de 12:
- \binom{12}{2} = 66
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