Quants Questions for CLAT | QB Set 15

A city administration conducted a study on changes in public services and infrastructure over a one-year period. The report highlighted percentage changes in different sectors. The number of buses operating in the city increased from 400 to 500. The number of daily metro passengers rose from 80,000 to 92,000. Water consumption in residential areas decreased from 250 million litres per month to 225 million litres per month due to conservation measures. The number of trees planted in public parks increased from 12,000 to 15,600. At the same time, electricity consumption in government buildings fell from 50,000 units per month to 42,500 units per month after energy-saving initiatives were introduced.

Officials noted that while some sectors experienced growth, others witnessed reductions. The administration plans to continue investing in sustainable development projects. The report also revealed that public satisfaction ratings increased from 60% to 75% during the year. Based on these changes, analysts evaluated the effectiveness of various programmes and measured the percentage increase or decrease in different indicators.

Questions

Q1. What is the percentage increase in the number of buses operating in the city?

A. 20%

B. 22.5%

C. 25%

D. 30%

Q2. By what percentage did residential water consumption decrease?

A. 10%

B. 12%

C. 15%

D. 8%

Q3. What is the percentage increase in the number of trees planted in public parks?

A. 30%

B. 25%

C. 20%

D. 35%

Q4. By what percentage did electricity consumption in government buildings decrease?

A. 12%

B. 15%

C. 18%

D. 20%

Q5. Public satisfaction ratings increased from 60% to 75%. What is the percentage increase relative to the original rating?

A. 20%

B. 22.5%

C. 24%

D. 25%

Answers and Explanations

Q1. Answer: C (25%)

Increase = 500 – 400 = 100

Percentage Increase = (100/400) × 100 = 25%

Q2. Answer: A (10%)

Decrease = 250 – 225 = 25

Percentage Decrease = (25/250) × 100 = 10%

Q3. Answer: A (30%)

Increase = 15,600 – 12,000 = 3,600

Percentage Increase = (3600/12000) × 100 = 30%

Q4. Answer: B (15%)

Decrease = 50,000 – 42,500 = 7,500

Percentage Decrease = (7500/50000) × 100 = 15%

Q5. Answer: D (25%)

Increase = 75 – 60 = 15

Percentage Increase = (15/60) × 100 = 25%