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The e-commerce site allows a discount of 16.66% on the marked price of Bluetooth speaker. How much percent above the cost price must he mark it so as to get a profit of 25%?  
1. 25%
2. 20%
3. 50%
4. 56%

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Correct Answer - Option 3 : 50%

Given:
Discount on M.P. = 16.66%
Profit on cost price = 25% 

Concept used:
S.P. = C.P. × (100 + Profit %)/100
Indirect process:-
M.P. = S.P. × 100/(100 – discount %)

Calculation: 
Let the cost price of the Bluetooth speaker be 100
Selling price of the Bluetooth speaker to get 25% profit  = 100 × (100 + 25)/100 = 125
Discount = 16.66% = 1/6
Marked price of the Bluetooth speaker before giving the 16.66% discount = 125 × 6/(6 – 1)
⇒ 125 × 6/5
⇒ 25 × 6
⇒ 150
Percentage of price marked above the cost price = 50%
∴ Price marked above the cost price is 50%.

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