A photographer was told that the average number of lion sightings on a 3-day safari is 1. What is the probability of not seeing any lion over the course of the 3-day safari? 0.368 0.000 0.500 0.333

In a town, the number of electric power failures occurs randomly with an average of one failure every 4 months. What is the variance associated with the number of failures over six consecutive months?

The number of births in a hospital follows a Poisson distribution with an average number of 1 birth per hour. What is the standard deviation associated with the number of births within a whole day (i.e. over 24 hours)?

61. Se lanza un dado cargado, con forma de dodecaedro ( 12 caras), cuyas caras están numeradas consecutivamente desde el 1 al 12 , en que la probabilidad de caer en un número par es el triple que la de caer en un impar. ¿Cuál es la probabilidad de obtener al menos un 6 ?

In a town, the number of electric power failures occurs randomly with an average of one failure every 4 months. Calculate the probability that there will be no failure over the whole year. 0.000 0.05 0.735

The number of births in a hospital follows a Poisson distribution with an average number of 1 birth per hour. What is the probability that there will be no birth within the next 2 hours? 1.00 0.135 0.368 0.250