Question

The following table represents the number of minutes that 20 airline passengers had to wait in order to pass through security along with the frequency in each class.
Minutes with Security Number of Passengers
0 to under 10 minutes 4
10 to under 20 minutes 8
20 to under 30 minutes 5
30 to under 40 minutes 3

What is the approximate average number of minutes that a passenger waits to pass through security?
A) 14.0
B) 15.5
C) 17.0
D) 18.5

Answer

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