The number of phone calls arriving at a switchboard each hour has been recorded,and the following frequency distribution has been developed. What is the cumulative frequency of the third class?
A) 80
B) 0.40
C) 155
D) 75
E) 105

Question

The number of phone calls arriving at a switchboard each hour has been recorded,and the following frequency distribution has been developed.  What is the cumulative frequency of the third class?
A) 80 
B) 0.40 
C) 155 
D) 75 
E) 105

Quizplus · Accepted Answer

The Answer of The number of phone calls arriving at a switchboard each hour has been recorded,and the following frequency distribution has been developed.  What is the cumulative frequency of the third class?
A) 80 
B) 0.40 
C) 155 
D) 75 
E) 105

The Number of Phone Calls Arriving at a Switchboard Each