Latest TCS Aptitude Question SOLUTION: If the price of an item is decreased by 10% and then increased by 10%, the net effect on the price of the item is a. A decrease of 99% b. No change c. A decrease of 1% d. An i

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(#M40034624) TCS Numerical Ability question algebra Keep an EYE

If the price of an item is decreased by 10% and then increased by 10%, the net effect on the price of the item is

a. A decrease of 99%
b. No change
c. A decrease of 1%
d. An increase of 1%

Asked In TCS saloni daga (10 years ago)

Solved y.vijay kumar Read Solution (24)

Is this Puzzle helpful?   (48)   (12) Submit Your Solution Percentage

Read Solution (24) :

y.vijay kumar  (10 years ago)

initially assume 100 rupees
10% discount in 100 gives price of 90 rupees
then 10% raise in 90 is only 9 rupees.
therefore total price =99 rupees.
hence 1% is the loss

Is this solution Helpfull? Yes (33) | No (1)  

Aastha  (9 years ago)

loss of 1% use the formula loss=[x/10]^2

Is this solution Helpfull? Yes (10) | No (2)  

Ann Theressa  (10 years ago)

c) A decrease of 1%

Let x be the price
Decrease by 10%-->
New price = x - x*10/100
=0.9x

Increase in 10%
New price = 0.9x + 0.9*10/100
=0.99x

Net effect =( x - 0.99x)/x *100 = 1% derease

Is this solution Helpfull? Yes (7) | No (1)  

srija  (10 years ago)

ans:C
let initial price= x
10%decrease===> price=90x/100
10%increase==> new price= (90x/100)+ 10% of 90x/100
= 99x/100
effect on price= new- initial
= 99x/100 - x
=-1/100
-ve sign indicates decrease in cost....

Is this solution Helpfull? Yes (2) | No   

archita chaudhuri  (10 years ago)

option c

let initial price = 100

100 ---->(10% decrease) 90 ---->(10% increase) 99

net effect =(100-99)/100 x 100 %
=1% decrease

Is this solution Helpfull? Yes (2) | No   

vikram kumar  (9 years ago)

initially assume 100 rupees
10% discount in 100 gives price of 90 rupees
then 10% raise in 90 is only 9 rupees.
therefore total price =99 rupees.
hence 1% is the loss

Is this solution Helpfull? Yes (2) | No   

khushboo  (9 years ago)

x=-10% y=10%
overall change=x+y+x*y/100
=-10+10-10*10/100
=-1 %
A decrease of 1%

Is this solution Helpfull? Yes (2) | No   

mangaldeep kiran  (8 years ago)

-10+10+((-10)*(10)/100)=-1%

Is this solution Helpfull? Yes (2) | No   

priyanka priya  (10 years ago)

if increase and decrease of item percentage is same then there is a direct formula
p^2/100
put p=10 and we get (100/100)=1% decrease.

Is this solution Helpfull? Yes (1) | No   

monty shekhar sahu  (9 years ago)

1.1*0.9=0.99 , compare with 1 so 1% decrease.....

Is this solution Helpfull? Yes (1) | No   

timir nilkanth  (10 years ago)

b there is no change

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Padmaja mahapatra  (10 years ago)

ans is c,,,,,,,,

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Subrata Patra  (10 years ago)

c) a decrease of 1%
suppose the price of the item is x
then decreased by 10 %
net price of the item is 9x/10
then increased by 10%
then the net price of the item will be 9*11x/100=99x/100
that means the price of the item is decreased by 1%

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gangulasiva  (10 years ago)

b.nochange

Is this solution Helpfull? Yes | No (10)  

om anand  (9 years ago)

it can be solve like
-(x)^2/100
where x is the value of increment and decrement
so
-(10)^2/100=-1

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anupama kumari  (9 years ago)

inc%-dec%-dec%*inc%/100
10-10-10*10/100
hence -1%

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Pratik sharma  (9 years ago)

Answer is C clearly we can easily solve by taking 100 initially

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Ritika Shrivastava  (9 years ago)

Option c,
Let price be 100
New price will be 90
On incr
10/100*90=9
Loss of 1%

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MOKA TULASI RAO  (8 years ago)

net effect is decreases by 1% so ans is c

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Mohammad Husain  (8 years ago)

c decrease by 1%

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Robin singh  (8 years ago)

.90*1.1=.99 i.e 1 % decrease

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Anmol Goel  (8 years ago)

for both increase and decrease=(10/10)*(10/10)=1
=> no change b)

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VIVEK JAIN  (8 years ago)

In this type of question when the price is increased and decreased by value same value x. Then there is always a loss of
(x/10)^2

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Nikolaigogol  (7 years ago)

Ans :option(C)

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