Question 74

The first graph shows the number of students (boys and girls in thousands) in Grade 1 to Grade 5.

And the bar graph below shows the percentage share of five schools in the total students studying in that class.

Based on the information, if the boys to girls ratio in school D is 3 : 1, then the number of boys studying in School D is:

Solution

From the graph,

Total number of students in all grades = 20000+15000+12000+22000+8000+18000+14000+9000+10000+12000 = 140000

Number of students in School D = $$\frac{25}{100}\times140000=35000$$

Given, ratio of boys to girls in School D = 3:1

Number of boys in School D = $$\frac{3}{3+1}\times35000=\frac{3}{4}\times\ 35000=26250$$

Hence, the correct answer is Option C

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