Security There are 20 first-class passengers and 120 coach passengers scheduled on a flight. In addition to the usual security screening, 10% of the passengers will be subjected to a more complete search.

a. Describe a sampling strategy to randomly select those to be searched.

b. Here is the first-class passenger list and a set of random digits. Select two passengers to be searched, carefully demonstrating your process.

6543671127048794151620451022279476923593

c. Explain how you would use a random number table to select the coach passengers to be searched.

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