model 1 profit x after discount y Section-Wise Topic Notes With Detailed Explanation And Example Questions

MOST IMPORTANT quantitative aptitude - 4 EXERCISES

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The following question based on discount topic of quantitative aptitude

Questions : A profit of l0% is made after giving a discount of 5% on a T. V. If the marked price of the TV is Rs.2640.00, the cost price of the TV was :

(a) Rs.2396

(b) Rs.2380

(c) Rs.2280

(d) Rs.2296

The correct answers to the above question in:

Answer: (c)

Let the C.P. of TV be x, then

${x × 110}/100 = 2640 × 95/100$

$x = {2640 × 95}/110$ = Rs.2280

Using Rule 6,

Here, r = 10%, D = 5%,

M.P. = Rs.264000,C.P. = ?

$\text"MP"/\text"CP" = {100 + r}/{100 - D}$

$2640/\text"CP" = {100 + 10}/{100 - 5}$

C.P. = ${2640 × 95}/110$

= 24 × 95 = 2280

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Read more based problems makes profit Based Quantitative Aptitude Questions and Answers

Question : 1

A shopkeeper offers 10% discount on the marked price of his articles and still makes a profit of 20%. What is the actual cost of the article marked Rs.500 for him ?

a) Rs.375

b) Rs.400

c) Rs.440

d) Rs.425

Answer: (a)

Let the cost price of article be x

$500 × 90/100 = 120/100 × x$

450 = ${6x}/5$

$x = {450 × 5}/6$ = Rs.375

Using Rule 6,

C.P. = ? , M.P. = Rs.500, r = 20%, D = 10%

$\text"MP"/\text"CP" = {100 + r}/{100 - D}$

$500/\text"CP" = {100 + 20}/{100 - 10}$

C.P.= ${500 × 90}/120$ = Rs.375

Question : 2

The price that Akbar should mark on a pair of shoes which costs him Rs.1,200 to gain 12% after allowing a discount of 16% (in rupees) is

a) 1,500

b) 1,600

c) 1,344

d) 1,433

Answer: (b)

Let the marked price be x.

$x × 84/100 = {1200 × 112}/100$

$x × 84/100 = 112 × 12$

$x = {112 × 1200}/84$ = Rs.1600

Using Rule 6,

C.P. = Rs.1200, r = 12%, D = 16%

$\text"MP"/\text"CP" = {100 + r}/{100 - D}$

$\text"MP"/1200 = {100 + 12}/{100 - 16}$

M.P.= ${112 × 1200}/84$ = Rs.1600

Question : 3

In order to maintain the price line a trader allows a discount of 10% on the marked price of an article. However, he still makes a profit of 17% on the cost price. Had he sold the article at the marked price, he would have earned a profit per cent of

a) 35%

b) 33%

c) 30%

d) 32%

Answer: (c)

Let the marked price be Rs.100.

S.P. = 90% of 100 = Rs.90

Profit = 17%

C.P. = Rs.$90 × 100/117$ = Rs.$1000/13$

If no discount is allowed,

S.P. = Rs.100

Profit = Rs.$(100 - 1000/13)$ = Rs.$300/13$

Profit % = ${300/13}/{1000/13}$ × 100 = 30%

Using Rule 6,

Here, D = 10%, r = 17%,

Let the M.P. = Rs.100

$\text"MP"/\text"CP" = {100 + r}/{100 - D}$

$100/\text"CP" = {100 + 17}/{100 - 10}$

$100/\text"C.P." = 117/90$

C.P. = ${100 × 90}/117 = 1000/13$

Profit = S.P. - C.P.

= $100 - 1000/13$ = Rs.$300/13$

Profit % = ${300/13}/{1000/13} × 100%$ = 30%

Question : 4

The marked price of an article is Rs.200. A discount of 12$1/2$%is allowed on the marked price and a profit of 25% is made. The cost price of the article is :

a) Rs.140

b) Rs.120

c) Rs.200

d) Rs.175

Answer: (a)

Discount = $12{1}/2% = 25/2$%

After discount S.P.

= Rs.200 × 87.5 = Rs.175

Gain % = 25%

Required C.P.

= Rs.$100/125$ × 175 = Rs.140

Using Rule 6,

Here, r = 25%, D = 12.5%,M.P. = Rs.200, C.P. = ?

$\text"MP"/\text"CP" = {100 + r}/{100 - D}$

$200/\text"CP" = {100 + 25}/{100 - 12.5}$

C.P. = ${200 × 87.5}/125$ ⇒ C.P.= Rs.140

Question : 5

By giving a discount of 10% on the marked price of Rs.1100 of a cycle, a dealer gains 10%. The cost price of the cycle is :

a) Rs.891

b) Rs.1089

c) Rs.1100

d) Rs.900

Answer: (d)

Selling Price

= Rs.(1100 - 10% of 1100)

= Rs.(1100 - 110) = Rs.990

Let the cost price = x

x + 10% of x = 990

${11x}/10$ = 990

$x = {990 × 10}/11$ = Rs.900

Using Rule 6,

Here, r = 10%, D = 10%, M.P. = Rs.1100, C.P. = ?

$\text"MP"/\text"CP" = {100 + r}/{100 - D}$

$1100/\text"CP" = {100 + 10}/{100 - 10}$

C.P. = ${1100 × 90}/110$ = Rs.900

Question : 6

A trader wishes to gain 20% after allowing 10% discount on the marked price to his customers. At what per cent higher than the cost price must he marks his goods ?

a) 35%

b) 34$2/3$%

c) 30%

d) 33$1/3$%

Answer: (d)

Let the CP be Rs.100.

Then SP = Rs.120

Let the marked price be x.

Then, 90% of x = Rs.120

$x = {120 × 100}/90$

= $400/3 = 133{1}/3$

It is $33{1}/3$% higher than the CP.

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