TABLE 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.

-Referring to Table 2-5, if 100 calls were sampled, ________ of them would have lasted less than 5 minutes or at least 30 minutes or more.
A) 35
B) 37
C) 39
D) none of the above

Question

TABLE 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.
 
-Referring to Table 2-5, if 100 calls were sampled, ________ of them would have lasted less than 5 minutes or at least 30 minutes or more.
A) 35 
B) 37 
C) 39 
D) none of the above

Quizplus · Accepted Answer

To solve the problem, we need to add up the number of calls that lasted less than 5 minutes and the number of calls that lasted 30 minutes or more, and then divide by the total number of calls (100). 
From the table, we can see that there are 14 calls that lasted less than 5 minutes, and 26 calls that lasted 30 minutes or more. 
So, the total number of calls that lasted less than 5 minutes or at least 30 minutes or more is 14 + 26 = 40. 
Therefore, the percentage of calls that lasted less than 5 minutes or at least 30 minutes or more is (40/100) x 100 = 40%. 
Thus, the answer is C, which represents 39 percent.

TABLE 2-5 The Following Are the Duration in Minutes of a Sample