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alvaradolm6853
26.05.2020 •
Mathematics
En una caja hay 18 pares de calcetines rojos y 20 pares de calcetines azules. Si se extraen sucesivamente y sin remplazo, tres pares de calcetines al azar,calcula la probabilidad de que los tres pares de calcetines sean rojos y redondea el resultado
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Ответ:
0.097
Step-by-step explanation:
En primer lugar, calculamos el número total de calcetines = 20 + 18 = 38 calcetines
Ahora debemos recordar que tenemos 18 pares de medias rojas.
El dibujo de prueba de los primeros calcetines de ref r1 = 18/38 Por lo tanto, P (R1) = 18/38
Como la probabilidad es sin reemplazo, el número de calcetines restantes sería 37 y el número de calcetines rojos restantes sería 17.
La probabilidad de sacar un segundo calcetín rojo P (R2) = 17/37
El número de calcetines que quedan para la tercera selección sería 16 calcetines rojos y 36 calcetines totales Así; P (R3) = 16/36
La probabilidad total = P (R1) * P (R2) * P (R3) = 18/38 * 17/37 * 16/36 = 0.096728307255
Que es aproximadamente 0.097
Ответ:
never occur at the same time
Step-by-step explanation:
In Statistics, two events that are mutually exclusive never occur at the same time. For instance, in tossing a coin we can either land heads or tails but not both. The two events are said to be mutually exclusive.