Determine which sampling method was used in each scenario.

on a particular day 5 flights are selected at random and all of the passengers on these 5 flights are screened.

Airport security uses a random number generator to determine the next passenger to screen.

In the first scenario, where 5 flights are selected at random and all the passengers on these flights are screened, the sampling method used is called cluster sampling. Here, the flights serve as clusters, and all the passengers on the selected flights are included in the sample.

In the second scenario, where airport security uses a random number generator to determine the next passenger to screen, the sampling method used is simple random sampling. Each passenger has an equal chance of being selected, and the random number generator helps ensure the process is unbiased and random.