1.

The following figure shows the data of students enrolled in 5 years (2014 to 2018) for two schools P and Q. During this period, the ratio of the average number of the students enrolled in school P to the average of the difference of the number of students enrolled in schools P and Q is ______

A. 8 : 13
B. 23 : 8
C. 23 : 31
D. 31 : 23
Answer» C. 23 : 31


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