The figure shows school P and Q enrolments during 2014–2018. Find the ratio of average enrolment in P to the average difference in enrolment between the two schools over these years.
P enrolments in thousands are 3,5,5,6,4, summing to 23. Q values 4,7,8,7,5 sum to 31. The total positive difference Q−P is 8. Dividing both sums by five leaves ratio $23:8$, B. The common “thousands” scale cancels.
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