A shopkeeper allowed 10% and 20% successive discounts on a price of a watch. The percentage of total discount is –
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30 percentage of discount
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Given : A shopkeeper allowed 10% and 20% successive discounts on a price of a watch.
To Find : The percentage of total discount
Solution:
Let say price of watch before discount = 100X
After 10 % discount = 100X - (10/100)100X
= 100X - 10X
= 90X
After 20 % Discount on 90X
= 90X - (20/100)90X
= 90X - 18X
= 72X
Net discount = 100X - 72X = 28X
The percentage of total discount is = (28X/100X) * 100 = 28 %
The percentage of total discount is 28
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