RRB NTPC - Profit and Loss

1.

A single discount equivalent to successive discount of 20%, 10% is 

   A.) 72%
   B.) 28%
   C.) 32%
   D.) 76%

Answer: Option 'B'

(90 × 80)/100 = Rs.72/- 
100 - 72 = 28 % = Discout

2.

Meenal purchased a car for Rs.250000 and sold it for Rs.348000. What is the percent profit she made on the car? 

   A.) 40
   B.) 39.2
   C.) 38.4
   D.) 38

Answer: Option 'B'

Actual profit = 348000 - 250000 = 98000.
So, the Profit percent = 98000 × 100/250000 = 39.2%

3.

Mr. Baljit purchased 100 pieces of an article at the rate of Rs.480 per piece. He then listed the price so as to gain a profit of 25%. While selling the articles he offered a discount of 5%. What is the percentage of profit earned in the deal? 

   A.) 20.00
   B.) 15.00
   C.) 15.79
   D.) 18.75

Answer: Option 'D'

CP = Rs.480
:. Marked SP = Rs.480 + 25 x 480/100 = Rs.480 + 120 = Rs.600.
Actual SP = Rs.600 – 30 = Rs.570.
Profit = 570 – 480 = Rs.90.
Percentage profit = 90 x 100/480 = 18.75%.

4.

By selling an article for 480 a person lost 20%. For what should he sell it to make a profit of 20%?

   A.) 800
   B.) 760
   C.) 720
   D.) Rs.680

Answer: Option 'C'

Here SP = 80% of CP = 480
:. CP = 480 × 100/80 = 600.
For a profit of 20 % it should be = 600 × 120/100 = 720.

5.

If the cost of 10 tables and 15 chairs is Rs.20000 what will be the cost of tables and 21 chairs? 

   A.) Rs.27500
   B.) Rs.28000
   C.) Rs.32000
   D.) Rs.36000

Answer: Option 'C'

The cost of 10 tables + 15 chairs = Rs.20000
Multiplying each term by 7/5, we get
Cost of 10 x 7/5 tables + 15 x 7/5 chairs = Rs.20000 x 7/5
= 14 tables + 21 chairs = Rs.28000.

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