# Model 6 Consumption & Remaining Practice Questions Answers Test With Solutions & More Shortcuts

#### PERCENTAGE PRACTICE TEST [11 - EXERCISES]

Question : 1 [SSC CGL Tier-II 2015]

Water tax is increased by 20% but its consumption is decreased by 20%. Then the increase or decrease in the expenditure of the money is

a) 4% increase

b) 4% decrease

c) 5% decrease

d) No change

Using Rule 4,

If a number is increased by a% and then it is decreased by b%, then resultant change in percentage will be \$(a - b - {ab}/100)\$% (Negative for decrease, Positive for increase)

Percentage effect

= \$(20 - 20 + {20 × -20}/100)%\$ = – 4%

Negative sign shows decrease.

Question : 2 [SSC CGL Prelim 2008]

If the price of a commodity is increased by 50%, by what fraction must its consumption be reduced so as to keep the same expenditure on its consumption ?

a) \$2/3\$

b) \$1/3\$

c) \$1/4\$

d) \$1/2\$

Using Rule 8,

Required fractional decrease

= \$R/{100 + R} = 50/{100 + 50} = 1/3\$

Question : 3 [SSC CGL Prelim 2007]

The price of a certain item is increased by 15%. If a consumer wants to keep his expenditure on the item the same as before, how much per cent must he reduce his consumption of that item ?

a) 10\$20/23\$%

b) 13\$1/23\$%

c) 15%

d) 16\$2/3\$%

Using Rule 8,

If the income of a man is A% more than another man, then the income of another man is less in comparison to the 1st man by

\$(A/{(100 + A)}×100)\$%

If the price of a commodity increases by R%, then reduction in consumption, not to increase the expenditure is given by

\$(R/{100 + R} × 100)\$%

= \$15/{100 + 15} × 100 = 15/115 × 100\$

= \$300/23 =13{1}/23\$%

Question : 4 [SSC CPO S.I.2004]

If the price of tea is increased by 20%, by how much per cent the consumption of tea be reduced so that there is no increase in the expenditure on it ?

a) 8\$1/3\$%

b) 20%

c) 83\$1/3\$%

d) 16\$2/3\$%

Using Rule 8,

Reduction in consumption

= \$(R/{100 + R}× 100)%\$

= \$(20/120×100)% = 50/3% = 16{2}/3%\$

Question : 5 [SSC SO 2005]

The price of petrol is increased by 25%. By how much per cent a car owner should reduce his consumption of petrol so that the expenditure on petrol would not be increased ?

a) 20%

b) 30%

c) 25%

d) 50%

Using Rule 8,

Required per cent = \${25 × 100}/125 = 20%\$

## Recently Added Subject & Categories For All Competitive Exams

#### Top Compound Interest MCQ Questions, PDF IBPS RRB CLERK

Important Compound Interest Questions and Detailed Answers, PDF for IBPS RRB CLERK. Aptitude Practice Test Series for all Banks, Govt and Competitive Exams

20-Sep-2024 by Careericons

#### Top 100+ Profit Loss MCQ Questions, PDF IBPS RRB CLERK

Important Profit Loss Questions and Detailed Answers, PDF for IBPS RRB CLERK. Aptitude Practice Test Series for all Banks, Govt and Competitive Exams

20-Sep-2024 by Careericons

#### Top 100+ Spelling Test MCQ Questions, PDF IBPS RRB CLERK

Important Spelling Test Questions and Detailed Answers, PDF for IBPS RRB CLERK. English Practice Test Series for all Banks, Govt and Competitive Exams

20-Sep-2024 by Careericons

#### Top One Word Substitution Questions, PDF IBPS RRB CLERK

Important One Word Substitution Questions and Detailed Answers, PDF for IBPS RRB CLERK. English Practice Test Series for Banks, Govt and Competitive Exams

20-Sep-2024 by Careericons