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A shopkeeper buys certain goods. He sells one-third of them at 20% profit and three-eighth
of the remaining at 20% loss. What should be the mark-up on the remaining goods so that
after giving a discount of 20% on them while selling, the shopkeeper gets a profit of 10%
on overall transaction?
1) 50%
2) 40%
3) 25%
4) 20%
Answers
Given : A shopkeeper buys certain goods. He sells one-third of them at 20% profit and three-eighth of the remaining at 20% loss. remaining at a discount of 20% on Marked price . shopkeeper gets a profit of 10%
on overall transaction
To find : What should be the mark-up on the remaining goods
Solution:
Let say Shopkeeper buys 12G - goods
Cost price of each good = C
Total Cost Price = 12G * C = 12GC
10% Profit on over all transaction = (10/100)12GC = 1.2GC
Total Selling Price = 12GC + 1.2GC = 13.2GC
sells one-third of them at 20% profit
=> Selling Price = (1/3)12G * C( 1 + 20/100) = 4.8GC
remaining = 12 - (1/3)12G = 8G
(3/8) * 8G = 3G
Sold at loss of 20% loss
Selling Price = 3G * C(1 - 20/100) = 2.4GC
remaining item = 8G - 3G = 5G
Let say Marked Price = M
Price after 20% Discount = M - (20/100)M = 0.8M
Selling Price = 5G * 0.8M = 4MG
4.8GC + 2.4GC + 4MG = 13.2GC
=> 4MG = 6GC
=> M = 3C/2
=> M - C = C/2
100* (C/2)/C = 50 %
There should be 50 % Markup at remaining goods
option 1 is correct
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