( 67.67% ) ✅ Ejercicio 3 (cambio de intervalo) Enunciado: Un cajero automático atiende un promedio de 6 clientes por hora. a) Probabilidad de que en 30 minutos atienda exactamente a 2 clientes. b) Probabilidad de que en 2 horas atienda al menos 10 clientes.

30 min = 0.5 h → ( \lambda = 6 \times 0.5 = 3 ) ( P(X=2) = \frace^-3 \cdot 3^22! = \frac0.049787 \cdot 92 = \frac0.448082 = 0.22404 ) → 22.40%

Media por página: ( \lambda = 300 / 500 = 0.6 ) [ P(X=2) = \frace^-0.6 \cdot (0.6)^22! = \frac0.5488 \cdot 0.362 = \frac0.197572 = 0.09878 ] Respuesta: ( 9.88% ) ✅ Ejercicio 5 (aproximación Poisson a Binomial) Enunciado: Un dado se lanza 100 veces. ¿Probabilidad de obtener exactamente 5 veces el número 6?

Usando tabla o calculadora: ( P(X \leq 9) ) con ( \lambda = 12 ) ≈ 0.2424 Entonces ( 1 - 0.2424 = 0.7576 ) → ✅ Ejercicio 4 (eventos raros) Enunciado: En un libro de 500 páginas hay 300 erratas en total. Si se distribuyen al azar, ¿cuál es la probabilidad de que una página tenga exactamente 2 erratas?

2 horas → ( \lambda = 6 \times 2 = 12 ) ( P(X \geq 10) = 1 - P(X \leq 9) )

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