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** ****Sample questions for Wipro Placement Papers**** **

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**Sample questions for Wipro Placement Questions – Aptitude Solved Problem 1**

Find the
percentage saving, in buying a dozen articles for Rs. 126 instead of Rs. 12 for
one?

a) 12 b) 12 1/2 c) 15 d) 16 2/3

a) 12 b) 12 1/2 c) 15 d) 16 2/3

**Answer: B****Explanation:**

If bought at
Rs 12 for 1 => Cost price of the dozen articles = 12 x 12 =Rs 144

But given cost of price of the dozen
articles = Rs 126

Savings in Rupees = 144 -126 = 18

% Savings = $\frac{18}{144}$ x 100% =12 ½%

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**Sample questions for Wipro Placement Papers with Solutions – Aptitude Question 2**

Ravi's
salary was reduced by 25%.Percentage increase to be effected to bring the
salary to the original level is

a) 20% b) 25% c) 33 13 % d) 30%

Let Ravi’s initial salary be Rs 100.

After reduction of 25% , Ravi’s salary becomes Rs 75.

To bring his salary back, the salary must be increased by Rs 25

Percentage increase required = $\frac{Increase}{Value}$ x 100%

a) 20% b) 25% c) 33 13 % d) 30%

**Answer: C**

Explanation:Explanation:

Let Ravi’s initial salary be Rs 100.

After reduction of 25% , Ravi’s salary becomes Rs 75.

To bring his salary back, the salary must be increased by Rs 25

Percentage increase required = $\frac{Increase}{Value}$ x 100%

= $\frac{25}{75}$ x 100% = 1003 % = 33 1/3%

**Sample questions for Placement Questions with Answers – Percentages Solved Problem 3**

Salary
of Suresh is 25% less than the salary of Ramesh. By how much percent the salary
of Ramesh is more than the salary of Suresh?

a)12 12% b)16 23% c)33 13% d) 26 2%

a)12 12% b)16 23% c)33 13% d) 26 2%

**Answer: D**

**Explanation:**

Let salary of Ramesh be Rs 100

As Suresh’s salary is 25% less than the salary of
Ramesh

=> Suresh’s salary= Rs 75

Ramesh’s Salary is Rs 25 more than the salary of Suresh.

Ramesh’s Salary is Rs 25 more than the salary of Suresh.

Required
Percentage = $\frac{Difference}{Suresh's Salary}$ x 100%

= $\frac{25}{75}$ x 100% = 33 13%

= $\frac{25}{75}$ x 100% = 33 13%

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**Sample questions for Placement
Questions with Explanations–Aptitude Percentages Problem 4**

On increasing the price of T.V. sets
by 30%, their sale decreases by 20%. What is the effect on the revenue receipts
of the shop ?

a) 4% increase b) 4% decrease c) 8% increase d) 8% decrease

Let the price of TV be = Rs.100, and number of units sold = 100

Then, Revenue receipts = Rs.(100 × 100) = Rs.10000

a) 4% increase b) 4% decrease c) 8% increase d) 8% decrease

**Answer: A**

Explanation:Explanation:

Let the price of TV be = Rs.100, and number of units sold = 100

Then, Revenue receipts = Rs.(100 × 100) = Rs.10000

Now price is increased by 30% and sales are
decreased by 20%.

Now price of TV is Rs 130 and number of sales is 80

New Revenue receipts = Rs.(130 × 80) = Rs.10400

Percentage Increase % = Increase/Initial Value × 100

New Revenue receipts = Rs.(130 × 80) = Rs.10400

Percentage Increase % = Increase/Initial Value × 100

= $\frac{400}{10000}$ x 100 % = 4% increase

**Direct Formula :**

A price is increased by a% and sales are decreased
by b%, then overall percentage change in its revenue = a – b - $\frac{ab}{100}$ %

Therefore, % change in receipts = 30 -20
– $\frac{30 \times 20}{100}$ %

= 4% increase

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**Sample questions for Placement Questions – Aptitude
Questions Percentages Question 6**

The Maruti
price has risen by 25% and the sales have come down by 4%. What is the total
percentage change in revenue?

a)20% b)30% c)35% d)38%

**Answer: A**

**Explanation:**

Let the price of TV be = Rs.100, and sales = 100 units

Then, Revenue receipts = Rs.(100 × 100) = Rs.10000

Now price is increased by 25% and sales came down
by 4%.

Now price of Maruti is Rs 125 and number of sales
is 96

New Revenue receipts = Rs.(125 × 96) = Rs.12000

Percentage Increase % = IncreaseInitial Value × 100

New Revenue receipts = Rs.(125 × 96) = Rs.12000

Percentage Increase % = IncreaseInitial Value × 100

= $\frac{2000}{10000}$ x 100 % = 20%

**Direct Formula:**

A price is increased by a% and sales are decreased
by b%, then overall percentage change in its revenue = a – b - ab100 %

Therefore ,% change in receipts = 25 -4 – $\frac{25 x 4 }{100}$ %

= 20%

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**Sample questions for Previous Placement Papers with Solutions
- Percentages Problem 6**

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) No change b) 5% decrease c) 4% increase d) 4% decrease

Let water tax is Rs 100 per liter and price of each liter is Rs 100

a) No change b) 5% decrease c) 4% increase d) 4% decrease

**Answer: d**

Explanation:Explanation:

Let water tax is Rs 100 per liter and price of each liter is Rs 100

Expenditure = Tax x Consumption = 100 x
100 = Rs 10000

Now Water tax is increased by 20% and
consumption is decrease by 20%.

There now tax is Rs 120 per litre and
consumption is 80 liters

Expenditure after changes = 120 x 80 =
Rs 9600

% Decrease in expenditure = DecreaseInitial Expenditure x 100%

= 400/10000 x 100 % = 4% decrease

**Direct Formula:**

A tax is increased by a% and consumption is
decreased by a%, then overall percentage change in its revenue = - (a

^{2}100)%
Therefore ,% change in expenditure
= -(20

^{2}00)% =- 4%
= 4% decrease

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**Sample questions for Placement Papers with Answers – Aptitude Percentages
Question 7**

If
radius of a circle is diminished by 10%, then its area is diminished by

a) 10% b) 19% c) 20% d) 36%

a) 10% b) 19% c) 20% d) 36%

**Answer: d**

Explanation:Let initial radius is 10 cm

Explanation:

Then,
Area of the circle = pi x R X R

=3.14 x 10 x 10 =pi x R X R

=3.14 x 10 x 10 =314

Now the radius is decreased by 10%, now the radius
is 90% of 10= 9

Now , Area of the circle = pi x R X
R

=3.14
x 10 x 10 =pi x R X R

=3.14
x 9 x 9 =254.34

Area
diminished by =314-254.34/314 x 100% = 19% decrease in area.

**Shortcut :**

As radius is decreased by 10%, while
calculating the area , we take radius twice. So decrease happens 2 times .

The formula
is = -10-10 + 10 x 10/100

= -19% = 19% decrease in area.

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**Sample questions for Placement Papers with Answers – Sample questions for
Aptitude Question Percentage 8**

If the price of petrol increases by 25% and Kevin
intends to spend only 15% more on petrol. By how much percent should he reduces
the quantity of petrol that he buys?

a)5% b)8% c)10% d)15%

**Answer: B**

Explanation:Let initial price of petrol is Rs 10 and his consumption is 10 litres.

Explanation:

So
his previous spending on petrol = 10 x 10 = Rs 100

Now Petrol Price is increased by 25% = Price after increase is Rs 12.50

Now Petrol Price is increased by 25% = Price after increase is Rs 12.50

Now Kevin ready to spend
only 15% more on petrol =>So he increases the expenditure by 15%.

Now his spending on petrol
becomes Rs 115.

Now his consumption in litres = 115/12.5 =9.2 litres

Now his consumption in litres = 115/12.5 =9.2 litres

Percentage reduction in his consumption
= 10- 9.210 x 100 = 8%

So the quantity is reduced
by 8%

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**Sample questions for Placement Papers Aptitude Questions –Percentages Question 9**

In an examination, 35% of total
students failed in Hindi, 45% failed in English and 20% in both. The percentage
of these who passed in both the subjects is:

a) 10% b) 20% c) 30% d) 40%

a) 10% b) 20% c) 30% d) 40%

**Answer: D**

Explanation:Failed in Hindi n(a)= 35% Failed in English n(B)= 45%Explanation:

Failed in both subjects n(a∩b) = 20 %

We know that n(a∪b) = n(a) + n(b) − n(a∩b)

Failed in Hindi or English = 35 + 45 – 20 = 60

Students who passed in both subjects = 100 – 60 = 40.

We know that n(a∪b) = n(a) + n(b) − n(a∩b)

Failed in Hindi or English = 35 + 45 – 20 = 60

Students who passed in both subjects = 100 – 60 = 40.

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**Sample questions for previous placement papers with answers – Percentages
Question 10**

If there are 5,000 voters out of
which 20% are not eligible to vote and there are two candidates contesting. The
winning candidate won by 15% of votes. What is the total number of votes he got?

a)2300 b)2500 c)3000 d)2700

**Answer: A**

**Explanation:**20% of the votes are not eligible to vote

So Number of voters eligible for voting = 5000 × 80/100= 4000

Difference
between votes got by winner and looser = 15%

Number of votes extra got by the winning candidate =
4000 × 0.15 = 600

Remaining votes are 4000-600=
3400

Each one got = 3400/2 = 1700

Now winner got = 1700 + 600 =
2300

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**Sample questions for Placement Papers Previous Questions–Aptitude Question
Percentages 11**

The
population of a town increases 4% annually but is decreased by emigration
annually to the extent of (12)%. What will be the increase percent in 3 years?

a) 9.8 b) 10 c) 10.5 d) 10.8

a) 9.8 b) 10 c) 10.5 d) 10.8

**Answer: d**

Explanation:Overall increase in population is 4% - (1/2)% = 3 ½% =7/2%

Explanation:

Let initial population of town be 1000.

After 3 years, the population
will be => 1000 x $\frac{207}{100}$ x $\frac{207}{100}$ x $\frac{207}{100}$

=>1108.72

% increase in 3 years = 1108.72-1000/1000 x 100% = 10.8 (approximately)

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**Sample questions for Placement Papers with Explanations–Aptitude Questions
Percentages 12**

In a certain school, 20% of the students are
below 8 yrs of age. The number of students above 8 yrs of age is (23) of the
number of students of 8 years age which is 96. What is the total number of
students in the school?

a)120 b)150 c)180 d)200

**Answer: D****Explanation:**Let total number of students be N

Below 8 years of age are 25% of N = 0.25N

⇒ 0.2x + $\frac{2}{3}$

× 96 + 96 = N

Therefore total number of students N = 200

⇒ 0.2x + $\frac{2}{3}$

× 96 + 96 = N

Therefore total number of students N = 200