9) En un examen se proponen 6 preguntas. Cada pregunta tienen4 respuestas posibles (A, B, C y D). Si se contesta al azar, ¿Cuántos exámenes distintos puede presentarse? \( \begin{array}{llll}\text { A) } 24 & \text { B) } 720 & \text { C) } 1296 & \text { D) } 4096\end{array} \)

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 next six months. 0.2231 0.6653 0.1353 0.3679

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 at least one birth within the next 2 hours? \( \frac{0.8647}{0.6321} \) 0.1353

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

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)?