Question

What is the difference between the number of boys doing their PG in Zoology and the number of girls doing their PG in Mathematics?

• A. 50
• B. 60
• C. 30
• D. 40
• E. None of these

Answer 1

The correct option is A 50

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 $=50$

Required difference $=100-50=50$