Question

In which PG course, is the number of girls the highest and in which course is the number of boys is the lowest?

• A. Botany and Mathematics
• B. Mathematics and Physics
• C. Botany and Zoology
• D. Botany and Physics
• E. Statistics and Physics

Answer 1

The correct option is D Botany and Physics

Number of boys $=\frac{900\times 5}{9}=500$
Number of girls $=900-500=400$
Zoology,
Girls$=400\times \frac{1}{5}=80$
Boys $=180-80=100$
Statistics,
Girls$=400\times \frac{1}{4}=100$
Boys$=\frac{3}{2}\times 100=150$
Botany,
Boys$=500\times \frac{1}{5}=100$
Girls $=220-100=120$
Mathematics,
Girls $=150\times \frac{1}{3}=50$
Boys $=100$
Physics,
Boys $=50$
Girls $=50$

Botany $\Rightarrow$ Girls $=120$
Physics$\Rightarrow$ Boys $=50$