model 6 consumption & remaining Section-Wise Topic Notes With Detailed Explanation And Example Questions
MOST IMPORTANT quantitative aptitude - 11 EXERCISES
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The following question based on percentage topic of quantitative aptitude
(a) $2/3$
(b) $1/3$
(c) $1/4$
(d) $1/2$
The correct answers to the above question in:
Answer: (b)
Using Rule 8,
Required fractional decrease
= $R/{100 + R} = 50/{100 + 50} = 1/3$
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Read more consumption remaining Based Quantitative Aptitude Questions and Answers
Question : 1
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$2/3$%
Answer »Answer: (b)
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 : 2
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$2/3$%
Answer »Answer: (d)
Using Rule 8,
Reduction in consumption
= $(R/{100 + R}× 100)%$
= $(20/120×100)% = 50/3% = 16{2}/3%$
Question : 3
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%
Answer »Answer: (a)
Using Rule 8,
Required per cent = ${25 × 100}/125 = 20%$
Question : 4
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
Answer »Answer: (b)
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.
GET percentage PRACTICE TEST EXERCISES
model 1 simple percentage questions
model 2 net increase or decrease in %
model 3 reducing & exceeding prices
model 4 x & y comparison
model 5 income & expenditure
model 6 consumption & remaining
model 7 marks scored in examinations
Model 8 population based
model 9 voters & election
model 10 percentage with allegations & mixture
model 11 percentage with ratios
percentage Shortcuts and Techniques with Examples
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model 1 simple percentage questions
Defination & Shortcuts … -
model 2 net increase or decrease in %
Defination & Shortcuts … -
model 3 reducing & exceeding prices
Defination & Shortcuts … -
model 4 x & y comparison
Defination & Shortcuts … -
model 5 income & expenditure
Defination & Shortcuts … -
model 6 consumption & remaining
Defination & Shortcuts … -
model 7 marks scored in examinations
Defination & Shortcuts … -
Model 8 population based
Defination & Shortcuts … -
model 9 voters & election
Defination & Shortcuts … -
model 10 percentage with allegations & mixture
Defination & Shortcuts … -
model 11 percentage with ratios
Defination & Shortcuts …
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