Approximately 9 percent of the residents of a large city have seen a certain theater production that is currently playing in the city. a marketing researcher will randomly select residents until one is found who has seen the production. what is the expected number of residents the researcher will need to ask to find someone who has seen the production?

11

Step-by-step explanation:

A marketing researcher selects the residents until the resides who have seen a theater production is selected. This statements demonstrates that experiment is repeated a variable number of time until first success is achieved so, the experiment conducted is a geometric experiment.

The quantity 9% shows the probability of success and so p=0.09.

The probability distribution function of geometric distribution is

The mean of geometric distribution is μ=1/p.

The expected number of residents the researcher will need to ask

Thus  expected number of residents the researcher will need to ask are 11 residents.

1/800 is the right answer

i dont get the question

step-by-step explanation: