The above graph shows the percentage of students who have scored a first class in Maths and English in Div A, Div B. Div C and Div D of a school. Based on the graph answer the question:
If a total of 160 students are equally distributed in all the four divisions, what is the difference between the number of students who have scored first class marks in English and Maths over all divisions?

Correct option is A

Given:
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Total students = 160
Students are equally distributed among 4 divisions.

So, students in each division = 160 ÷ 4 = 40

From the graph:

Division English Maths
A 50% 25%
B 40% 30%
C 25% 25%
D 25% 35%

Formula:

Number of students = (Percentage × Total students in the division) ÷ 100

Solution:

Students in each division = 40

English:

Division A = 50% of 40 = 20
Division B = 40% of 40 = 16
Division C = 25% of 40 = 10
Division D = 25% of 40 = 10

Total students scoring first class in English

= 20 + 16 + 10 + 10

= 56

Maths:

Division A = 25% of 40 = 10
Division B = 30% of 40 = 12
Division C = 25% of 40 = 10
Division D = 35% of 40 = 14

Total students scoring first class in Maths

= 10 + 12 + 10 + 14

= 46

Difference

= 56 − 46

= 10

Final Answer:
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10. So the correct answer is (A).