Let the actual price of music system = ? P
The cost of music system to Mr. P after 20% discount= (80/100) x P = 4P/5
Cost of music system to Mr P after 25% discount = (75/100) x P = 3P/4
Then according to the question,
4P/5 - 3P/4 = 500
? (16P - 15P)/20 = 500
? P = 20 x 500 = 10000
? Cost of music system at 20% discount = (80 x 10000)/100 = ?8000
SP at the stall at the trade fair = 2P - 20% of 2P = 8P/5
CP of the jacket = (P x 100)/(100 + 10) = 10P/11
? profit = 8P/5 - 10/11 = 38P/55
? Profit per cent made at the trade fair = [(38P/55) / (10P/11)]x 100
= (38/5) x (1/10) x 100
= 76%
Amount paid by B = ?110
Amount paid by C = 110 x 90/100 = ? 99
Then, If C paid ? 99 then, A paid ? 100.
If C paid ? 2079, then A paid = 2079 x (100/99) = ? 2100
Suppose the manufacturer should product produce x items.
? 60x - (40x + 3000) = 1000
? 20x = 4000
? x = 200
CP of first article is ? 1500, Gain=20%
SP of first article = (120/100) x 1500 = ? 1800
Total CP = 1500 + 1000 = ? 2500
Total gain = 16%
Total SP = (116/100) x 2500 = ? 2900
SP of second article = (2900 - 1800) = ? 1100
Thus, he should sell the second article at ? 1100.
CP per kg of the mixture = (w1x1 + w2x2 + w3x3) / (w1 + w2 + w3)
= (7 x 72 + 33 x 87 + 35 x 85)/75
= (504 + 2871 + 2975)/75 = 6350/75 = ? 84.66
Profit = 15%
? SP per kg = ? 84.66 + 15% of ? 84.66
= ? 97.37
Market price = ? P
and SP = P -10% of P = 9P/10
? 9P/10 = 6750
? P = 7500
If SP = ? Rs.7500, then the CP would have been Rs.5000 due to 50% profit earned by the Shopkeeper.
? Actual percentage of profit by selling the article for ? 6750
= [(SP - CP)/CP] x 100 = [(6750 - 5000)/5000] x 100
= (1750/5000) x 100
= 35%
Let the fixed price of article = ?P
Then, Selling price = 90% of P = (90 x P)/100 = ? 9P/10
Also, the selling price = 115% of 72 = ?(115 x 72)/100
? (115 x 72)/100 = 9P/10
? P = ? 92
CP = ? 180, gain = 20%
? SP = (120/100) x 180 = ? 216
Let the MP be ? P.
Then, 80% of P = 216
? (80/100) x P = 216
? P = (216 x 100)/80 = 270
Thus, MP is ? 270.
Let the CP be ? 100 and let MP be ? x above ? 100.
Then, MP = ? (100 + x) and discount =10%
? SP = [(90/100) x (100 + x)] = ? 177
? x = 30
So, cost should be labelled at 30% above CP.
Let the MP of a scooter = ? P
? CP of a scooter= ? 11P/13, Gain = 10%
SP = (110/100) x P= ? 11P/10
Gain = SP - CP = (11P/10 - 11P/13) = (143P - 110P)/130 = ? 33P/130
Gain percentage = (33P/130) x (13/11P) x 100 % = 30%
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