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11
By selling an article at $$\frac{2}{3}$$ of the marked price, there is a loss of 10% . The profit percent, when the article is sold at the marked price, is -
Discuss
Answer & Solution
Answer: Option C
Solution:
$$\eqalign{ & {\text{Let the M}}{\text{.P be Rs}}{\text{. }}x. \cr & {\text{Then,}} \cr & {\text{S}}{\text{.P}}{\text{.}} = {\text{Rs}}.\frac{2}{3}x,{\text{loss}} = 10\% \cr & {\text{C}}{\text{.P}}{\text{.}} = {\text{Rs}}.\left( {\frac{{100}}{{90}} \times \frac{2}{3}x} \right) \cr & \,\,\,\,\,\,\,\,\,\,\,\, = {\text{Rs}}.\frac{{20}}{{27}}x \cr & {\text{If an article is sold at M}}{\text{.P}}{\text{.}} \cr & {\text{Then,}} \cr & {\text{Profit}} = {\text{Rs}}.\left( {x - \frac{{20}}{{27}}x} \right) \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = {\text{Rs}}.\frac{{7x}}{{27}} \cr & \therefore {\text{Profit}}\% \cr & = \left( {\frac{{7x}}{{27}} \times \frac{{27}}{{20x}} \times 100} \right)\% \cr & = 35\% \cr} $$
12
Raghavan purchase a scooter at $$\frac{13}{15}$$ of its selling price and sold it at 12% more than its selling price. His gain is -
Discuss
Answer & Solution
Answer: Option B
Solution:
$$\eqalign{ & {\text{Let S}}{\text{.P}}{\text{. be Rs}}{\text{. }}x \cr & {\text{Then,}} \cr & {\text{C}}{\text{.P}}{\text{.}} = {\text{Rs}}.\frac{{13}}{{15}}x, \cr & {\text{Receipt}} = 112\% {\text{ of Rs}}{\text{. }}x \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = {\text{Rs}}.\frac{{28}}{{25}}x \cr & {\text{Gain}} = {\text{Rs}}.\left( {\frac{{28x}}{{25}} - \frac{{13x}}{{15}}} \right) \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\, = {\text{Rs}}.\frac{{19x}}{{75}} \cr & \therefore {\text{Gain}}\% \cr & = \left( {\frac{{19x}}{{75}} \times \frac{{15}}{{13x}} \times 100} \right)\% \cr & = \frac{{380}}{{13}}\% \cr & = 29\frac{3}{{13}}\% \cr} $$
13
A sells a bicycle to B at a profit of 20% . B sells it to C at a profit of 25% . If C pays Rs. 225 for it, the cost price of the bicycle for A is = ?
Discuss
Answer & Solution
Answer: Option D
Solution:
According to the question,
A   B   C  
10   \[\xrightarrow{{20\% {\text{ profit}}}}\]   12   \[\xrightarrow{{25\% {\text{ profit}}}}\]   12 + 3  = 15 \[ \to \] 225

$$\eqalign{ & \therefore {\text{1 unit}} = {\text{15}} \cr & \therefore {\text{10 units}} = 10 \times 15 \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = {\text{Rs}}{\text{.150}} \cr} $$
14
A house worth Rs. 150000 is sold by X at a 5% profit to Y, Y sells the house back to X at a 2% loss. Then find profit and loss in the entire transaction = ?
Discuss
Answer & Solution
Answer: Option C
Solution:
Money spent by X = Rs. 150000
Money received by X = 105% of Rs. 150000 = Rs. 157500
C.P. to X = 98% of Rs. 157500 = Rs. 154350
∴ X gains Rs. (157500 - 154350) = Rs. 3150
15
A manufacturer sells an article to a wholesale dealer at a profit of 10% . The wholesale dealer sells it to a shopkeeper at 20% profit. The shop - keeper sells it to a customer for Rs. 56100 at a loss of 15% . Then the cost price of the article to the manufacturer is = ?
Discuss
Answer & Solution
Answer: Option C
Solution:
$$\eqalign{ & = \left( {\frac{{56100 \times 100 \times 100 \times 100}}{{\left( {100 - 15} \right) \times \left( {100 + 10} \right) \times \left( {100 + 20} \right)}}} \right) \cr & = \left( {\frac{{56100 \times 100 \times 100 \times 100}}{{85 \times 110 \times 120}}} \right) \cr & = {\text{Rs}}{\text{.}}\,50000 \cr} $$
16
An increase of Rs. 3 in the selling price of an article turns a loss of $$7\frac{1}{2}$$% into a gain of $$7\frac{1}{2}$$%. The cost price in (Rs.) of the article is -
Discuss
Answer & Solution
Answer: Option C
Solution:
$$\eqalign{ & {\text{Let C}}{\text{.P}}{\text{. be Rs}}{\text{. }}x \cr & {\text{Then,}} \cr & 107\frac{1}{2}\% {\text{ of }}x - 92\frac{1}{2}\% {\text{ of }}x = 3 \cr & \Rightarrow \frac{{215}}{{200}}x - \frac{{185}}{{200}}x = 3 \cr & \Rightarrow \frac{{30x}}{{200}} = 3 \cr & \Rightarrow x = 20 \cr} $$
17
A shopkeeper sells an article at $$12\frac{1}{2}$$% loss. If he sells it for Rs. 92.50 more than he gains 6% . What is the cost price of the article ?
Discuss
Answer & Solution
Answer: Option A
Solution:
$$\eqalign{ & {\text{Let C}}{\text{.P}}{\text{. be Rs}}{\text{. }}x \cr & {\text{Then,}} \cr & {\text{ = }}\left( {106\% {\text{ of }}x} \right) - \left( {87\frac{1}{2}\% {\text{ of }}x} \right) = 92.50 \cr & \Rightarrow 18\frac{1}{2}\% {\text{ of }}x = 92.50 \cr & \Rightarrow x = \left( {\frac{{92.50 \times 100 \times 2}}{{37}}} \right) = 500 \cr & {\text{CP}} = {\text{Rs}}{\text{. }}500 \cr} $$
18
A sells a cycle to B at a profit of 10% , B sells to C at a profit of 20% . If C pays Rs. 264 for it, how much did A pay for it ?
Discuss
Answer & Solution
Answer: Option A
Solution:
Let cost price for A = Rs. 100
SP for A = CP for B = 100 + 10% of 100 = 110
SP for B = CP for C = 110 + 20% of 110 = 132
Given,
CP for C = 264
So,
132 = 264
$$\eqalign{ & 1 = \frac{{264}}{{132}} \cr & 100 = \frac{{264 \times 100}}{{132}} = {\text{Rs}}{\text{.}}\,200 \cr} $$
CP for A = Rs. 200
19
A sold a tape - recorder to B for Rs. 4860 at a loss of 19% . Again B sold it to C at price that would give A a profit of 17% . The gain of B is = ?
Discuss
Answer & Solution
Answer: Option C
Solution:
CP of the Product = $$\frac{{4860 \times 100}}{{81}} = 6000$$
Loss of A = 6000 - 4860 = 1140
Now B sold the product to C with 17% profit of A
i.e. 6000 + 17% of 6000
= 6000 + 1020
= 7020

∴ Total Profit of B = 7020 - 4860 = 2160
% Gain of B   $$ = \frac{{2160}}{{4860}} \times 100 = 44\frac{4}{9}\% $$
20
A dishonest fruit vendor sells his goods at cost price but they uses a weight of 900 gm. for the 1 kg. weight. His gain percent is = ?
Discuss
Answer & Solution
Answer: Option B
Solution:
According to the question,
Shopkeeper sells his goods at cost price
Let, Cost price of 1000 gm. goods = Rs. 1000
He sold 900 gm. goods
Selling price of 900 gm. goods = Rs. 1000
Cost price of 900 gm. goods = Rs. 900
$$\eqalign{ & {\text{Profit}}\% = \frac{{100}}{{900}} \times 100 \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 11\frac{1}{9}\% \cr} $$