model 5 income & expenditure Practice Questions Answers Test with Solutions & More Shortcuts
percentage PRACTICE TEST [11 - 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
Question : 11 [SSC CPO S.I.2003]
If the monthly salary of an employee is increased by 2$2/3$% , he gets 72 rupees more. His monthly salary (in rupees) is
a) 2700
b) 3600
c) 7200
d) 2000
Answer »Answer: (a)
Suppose monthly income = Rs.x
Then, $8/3$% of x = 72
x × $8/300$ = 72
${72× 300}/8$ = Rs.2700
Question : 12 [SSC Investigater 2010]
Income of A is 10% more than income of B. Let B's income be x% less than A's income. Find x.
a) 11%
b) 10$1/11$%
c) 9$1/11$%
d) 10%
Answer »Answer: (c)
Using Rule 8,
Simple method
x = $(10/{100 + 10} × 100)$%
= $(1000/110)% = (100/11)% = 9{1}/11%$
Note : If A is r% more than B, then B is
$(r/{100 + r} × 100)$% less than A
Question : 13 [SSC CISF ASI 2010]
A's salary is 40% of B's salary and B's salary is 25% of C's salary. What percentage of C's salary is A's salary ?
a) 15%
b) 10%
c) 5%
d) 20%
Answer »Answer: (b)
Let B's salary = Rs.100
C's salary = Rs.400
and A's salary = Rs.40
Required percentage = $40/400 ×100$ = 10%
Question : 14
A person gave 20% of his income to his elder son, 30% of the remaining to the younger son and 10% of the balance, he donated to a trust. He is left with Rs.10080. His income was :
a) Rs.30000
b) Rs.40000
c) Rs.50000
d) Rs.20000
Answer »Answer: (d)
Let income be Rs.100
Sum given to elder son = 20% of Rs.100 = Rs.20
Remaining Sum = Rs. 80
Sum given to younger son = 30% of Rs.80 = Rs.24
Remaining sum = Rs.(80 – 24) = Rs. 56
Sum given to the trust = 10% of Rs.56 = Rs.5.6
Remaining sum = Rs.(56 – 5.6) = Rs.50.4
When Rs.50.4 remains, total income = Rs.100
When Rs.10080 remains, total income = ${100 × 10080}/50.4$ = Rs.20000
Using Rule 20,
If a person saves ‘R' rupees after spending x% on food, y% on cloth and z% on entertainment of his income then,
Monthly income = $100/{100 - (x + y +z)}× R$
Here, R = Rs.10080; x = 20%, y = 30%, and z = 10%
Monthly income = $100/{100 – (20 +24 + 5.6)} ×10080$
= $1008000/{100 – 49.6} = 1008000/50.4 = 20,000$
Question : 15
If 60% of A's income is equal to 75% of B's income, then B's income is equal to x% of A's income. The value of x is :
a) 80
b) 60
c) 70
d) 90
Answer »Answer: (a)
Let A's income = Rs.a
and B's income = Rs.b
a × 60% = b × 75%
a × 4 = 5 × b
$b/a = 4/5$
Now, b = a × x%
$b/a = x/100 ⇒ x/100 = 4/5$
$x = 4/5×$ 100 = 80
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model 5 income & expenditure Shortcuts »
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Click to Start..percentage Shortcuts and Techniques with Examples
-
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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