Discount
 A merchant marks an article 20% above cost price. He then sells it at a discount of 20%. The sale gives him :

 No loss or gain
 4% loss
 2% gain
 4% gain

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Let the C.P. of article be Rs. 100.
According to the question,
Marked price of article = Rs. 120
at 20% discount ,S.P. of article = Rs. 120 × 80 = Rs. 96 100
Loss = C.P. of article  S.P. of article = 100  96 = Rs. 4
Correct Option: B
Let the C.P. of article be Rs. 100.
According to the question,
Marked price of article = Rs. 120
at 20% discount ,S.P. of article = Rs. 120 × 80 = Rs. 96 100
Loss = C.P. of article  S.P. of article = 100  96 = Rs. 4∴ Loss percent = Loss × 100 C.P. Loss percent = 4 × 100 = 4% 100
 The marked price of a laptop is Rs. 12000. In a clearance sale it is sold at a discount of 15%, incurring a loss of 4%. What is the cost price of the laptop?

 Rs. 10200
 Rs. 10625
 Rs. 11200
 Rs. 10275

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Here , Marked price of a laptop = Rs. 12000
C.P. of laptop = Rs. y
According to the question,
( 100  4 )% of y = ( 100  15 )% of 12000y × 96 = 12000 × 85 = 120 × 85 100 100
Correct Option: B
Here , Marked price of a laptop = Rs. 12000
C.P. of laptop = Rs. y
According to the question,
( 100  4 )% of y = ( 100  15 )% of 12000y × 96 = 12000 × 85 = 120 × 85 100 100 ⇒ y = 120 × 85 × 100 96
y = Rs. 10625
 A watch dealer pays 10% customs duty on a watch which costs Rs. 500 abroad. He desires to make a profit of 20% after giving a discount of 25% to the buyer.The marked price should be

 Rs. 950
 Rs. 800
 Rs. 880
 Rs. 660

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Let the marked price of watch be Rs. y.
Actual C.P. of watch = 110% of 500Actual C.P. of watch = Rs. 500 × 110 = Rs. 550 100
According to the question,
Correct Option: C
Let the marked price of watch be Rs. y.
Actual C.P. of watch = 110% of 500Actual C.P. of watch = Rs. 500 × 110 = Rs. 550 100
According to the question,y × 75 = 550 × 120 100 100 ⇒ y = 550 × 120 = Rs. 880 75
 A merchant marked the price of an article by increasing its production cost by 40%. Now he allows 20% discount and gets a profit of Rs. 48 after selling it.The production cost is

 Rs. 320
 Rs. 360
 Rs. 400
 Rs. 440

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Let the production cost of article be Rs. y.
Here , a = 40% , b =  20%∴ Effective percentage = a + b + a × b % 100 Effective percentage = 40 − 20 − 40 × 20 % 100
Effective percentage = (20 – 8)% = 12%
According to the question,
12% of y = 48
Correct Option: C
Let the production cost of article be Rs. y.
Here , a = 40% , b =  20%∴ Effective percentage = a + b + a × b % 100 Effective percentage = 40 − 20 − 40 × 20 % 100
Effective percentage = (20 – 8)% = 12%
According to the question,
12% of y = 48⇒ 12y = 48 100 ⇒ y = 48 × 100 = Rs. 400 12
 The marked price of an article is 30% higher than the cost price. If a trader sells the articles allowing 10% discount to customer, then the gain percent will be

 17
 20
 19
 15

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Let the C.P. of article be Rs. 100.
∴ Its marked price = Rs. 130
After 10% discount , Its S.P. = 90% of 130S.P. = 130 × 90 = Rs. 117 4
Profit = S.P.  C.P. = 117  100 = 17
Correct Option: A
Let the C.P. of article be Rs. 100.
∴ Its marked price = Rs. 130
After 10% discount , Its S.P. = 90% of 130S.P. = 130 × 90 = Rs. 117 4
Profit = S.P.  C.P. = 117  100 = 17∴ Profit percent = Profit × 100 C.P. Profit percent = 17 × 100 = 17% 100