Question

Study the following chart carefully and answer the question given.
For course D, what is the respective ratio of boys and girls?

• A. $3:4$
• B. $4:5$
• C. $3:5$
• D. $5:6$

Answer 1

The correct option is A $3:4$

Total students in D$=\frac{35}{100}\times 1200=420$

Girls in D$=\frac{30}{100}\times 800=240$

Boys in course D$=420-240=180$

Ratio of boys and girls in D$=180:240=3:4$