The manager of Toy World knows that the probability an elect

The manager of Toy World knows that the probability an electronic game will be returned to the store is 0.2. If 56 games are sold in a given week, determine the probabilities of the following events. (Round your answers to four decimal places.) (a) No more than 12 games will be returned. (b) At least 8 games will be returned. (c) More than 5 games but fewer than 14 games will be returned.

Solution

probability an electronic game will be returned is 0.2. As 56 games are sold in week.

There is no mention about the probability distribution hence it can be assumed to be either binomial or Poission.

a) =BINOMDIST(12,56,0.2,TRUE)

=0.6776

b) atleast 8 games will be returned

probability = 0.8960

c) more than 5 games but fewer than 14 games will be returned

probability = 0.7616

c) more than 5 games but fewer than 14 games will be returned