Data Interpretation MCQ Questions and Answers - Bar Chart

In 2007, we have:
Total number of students = 455030
Number of those choosing the given three subjects
= 15000 + 10000 + 15000
= 40000
∴ Required percentage
$$\eqalign{ & = \left(\frac{40000}{455030}\times100\right)\% \cr & = 8.79\% \cr & \approx 9\% \cr} $$

Ratio of the number who opted for English in 2006 and 2008 to the number who opted for Hindi in 2005 and 2009
= (25 + 30) : (5 + 20)
= 55 : 25
= 11 : 5

Number of students who opted Hindi and Mathematics in 2006, 2007 and 2009
= {(5 + 35) + (15 + 15) + (20 + 5)} thousands
= 95000

Number of students who opted for the given three subjects in the year 2009 is
= 20000 + 20000 + 5000
= 45000
Number of girls = 38% of 45000
= 45000 × $$\frac{38}{100}$$
= 17100
Out of these, the number of boys who opted for Mathematics cannot be found.

Number of students opting Mathematics in 2005 and 2008
= 15000 + 30000
= 45000
Number of students opting for these three subjects in 2005 and 2008
= {(5 + 35 + 15) + (25 + 30 + 30)} thousands
= 55000 + 85000
= 140000
$$\eqalign{ & \text{Required %} \cr & = \left(\frac{45000}{140000}\times100\right)\% \cr & = \frac{225}{7}\% \cr & = 32.14\% \cr & \approx 32\% \cr} $$