School Enrolment Data Analysis

Question 1

What is the approximate percentage decrease in the number of boys in school D in the year 2017 as compared to the previous year ?

Accepted Answer

A. Boys in D in 2016 = 6.4 (640). Boys in D in 2017 = 5.3 (530). Percentage decrease = $\frac{6.4 - 5.3}{6.4} 	imes 100 = \frac{1.1}{6.4} 	imes 100 \approx 17.18\% \approx 17\%$.

Question 2

The number of girls in school B in the year 2018 is approximately what percent of the total number of students in school E in the year 2015 ?

Accepted Answer

B. Girls in B in 2018 = 5.9 (590). Total students in E in 2015 = $5.5 + 3.6 = 9.1$ (910). Percentage = $\frac{5.9}{9.1} 	imes 100 \approx 64.83\% \approx 65\%$.

Question 3

What is the average number of girls in school A in all years taken together ?

Accepted Answer

A. Total girls in A = $(3.6 + 4.2 + 6.9 + 9.6 + 12.9 + 14.4) 	imes 100 = 51.6 	imes 100 = 5160$. Average = $\frac{5160}{6} = 860$.

Question 4

What is the ratio of the number of boys in school C in the year 2018 to the number of girls in school A in the year 2018 ?

Accepted Answer

A. Boys in C in 2018 = 8.7 (870). Girls in A in 2018 = 12.9 (1290). Ratio = $870 : 1290 = 29 : 43$.

School $\rightarrow$	A	A	B	B	C	C	D	D	E	E
Years $\downarrow$	Boys	Girls	Boys	Girls	Boys	Girls	Boys	Girls	Boys	Girls
2014	3.3	3.6	5.2	3.1	5.5	4.5	2.4	1.4	6.5	6.6
2015	6.6	4.2	4.9	2.2	6.9	3.3	4.4	2.3	5.5	3.6
2016	9.3	6.9	4.7	4.2	5.8	4.9	6.4	3.3	2.7	2.4
2017	5.4	9.6	6.3	5.4	6.6	5.2	5.3	5.4	5.4	5.7
2018	8.4	12.9	7.5	5.9	8.7	6.6	12.1	5.2	6.8	6.5
2019	12.3	14.4	9.8	4.4	11.7	4.2	12.2	9.4	10.8	12.7

School Enrolment Data Analysis

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