In which subjects is the difference between the number of boys and girls equal ........

Quantitative Aptitude (CDS) Case Studies

For the next five (05) items that follow:
In a University there are 1200 students studying four difference subjects, Mathematics, Statistics, Physics and Chemistry. 20% of the total number of students are studying Mathematics, one-fourth of the total number of students are studying Physics, 320 students are studying Statistics and remaining students are studying Chemistry. Three-fifth of the total number of students studying Chemistry are girls. 150 boys are studying Mathematics. 60% of students studying Physics are boys. 250 girls are studying Statistics.

In which subjects is the difference between the number of boys and girls equal?

Mathematics and Chemistry

Statistics and Chemistry

Mathematics and Physics

Mathematics and Statistics

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Explanation:

Difference between the number of boys and girls in Mathematics = 150 – 90 = 60
Difference between the number of boys and girls in Physics = 180 – 120 = 60
Difference between the number of boys and girls in Statistics = 250 – 70 = 180
Difference between the number of boys and girls in Chemistry = 204 – 136 = 68
Hence Difference between the number of boys and girls in Mathematics and Physics are equal.