Clark Hammond
07/21/2024 · Middle School
b) Obtener una pelota amarilla la tercera vez que se toma una pelota.
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Para obtener una pelota amarilla la tercera vez, multiplica la probabilidad de no obtener una pelota amarilla en las dos primeras extracciones por la probabilidad de obtener una pelota amarilla en la tercera. La fórmula es: \(\left(\frac{N-K}{N}\right) \times \left(\frac{N-K-1}{N-1}\right) \times \left(\frac{K}{N-2}\right)\), donde \(N\) es el total de pelotas y \(K\) es el número de pelotas amarillas.
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