Consider the baggage check-in process of a small airline. Check-in data indicate that from 9 a. m. to 10 a. m., 240 passengers checked in. Moreover, based on counting the number of passengers waiting in line, airport management found that the average number of passengers waiting for check-in was 30.How long did the average passenger have to wait in line?

7.5 minutes

Explanation:

From the question, we are informed that the check-in data indicate that from 9 a.m. to 10 a.m., 240 passengers checked in and that the airport management found that the average number of passengers waiting for check-in was 30.

Based on the above scenario, the average passenger will have to wait in line for:

= (30 passengers × 1 hour)/ 240 passengers

= (30 × 60)/240

= 1800/240

= 7.5 minutes

there's 11 people for the 1st position. then, no matter who gets it, there's only 10 left for the second, and then 9 left for the third. 11 x 10 x 9 = 990.   the answer is there are 990 different ways the positions can be filled by these applicants