**Simple And Compound Interest Questions For RRB Group-D PDF:-**

Download Simple And Compound Interest Questions For RRB Group-D PDF with detailed solutions. Important Practice Simple And Compound Interest Questions based on previous year railway RRB exam papers.

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**Question 1:** Nita sold an article for Rs. 220 and earned a profit of 10%. At what cost should she sell to earn a profit of 30% ?

a) Rs. 220

b) Rs. 230

c) Rs. 260

d) Rs. 280_

**Question 2:** Marked price of a dining table is Rs. 6, 000 and its is sold to a customer for Rs. 5, 500. What is discount rate given on that table ?

a) 10%

b)$ 8 \frac {1}{3} $ %

c) 8%

d) 9%

**Question 3:** What is the sum which earns Rs. 420 as compound interest in second year at the annual interest rate of 5% ?

a) Rs. 4,000

b) Rs. 42,000

c) Rs. 8,000

d) Rs. 21,000

**Question 4:** A invested Rs 10,000 for 9 months and B invested Rs 18,000 for some times in a business If the profits of A and B are equal then the period of time for which B’s capital was invested is

a) 6 months

b) 5 months

c) 4 months

d) 3 months

**Question 5:** A sum of money was invested at a certain rate for 2 years. Had it been invested at 3% higher rate of interest, it would have fetched Rs. 450 more. The sum invested was—

a) Rs. 7500

b) Rs. 600

c) Rs. 5000

d) Rs. 4500

**Question 6:** On what sum of money will the compound interest for 3 years at 5% per annum amount to Rs. 630.50 ?

a) Rs. 1200

b) Rs. 1261

c) Rs. 4000

d) Rs. 3000

**Question 7:** On what sum of money will the compound interest for 3 years at 5% per annum amount to Rs. 630.50 ?

a) Rs. 1200

b) Rs. 1261

c) Rs. 4000

d) Rs. 3000

**Question 8:** Marked price of an article is Rs. 500. The shopkeeper sells the article at successive discounts of 15% and 10%. Another shopkeeper sells the same article and gives the successive discounts of 9% and 16%. From which shopkeeper the customer will get more benefit ?

a) First

b) Second

c) Equal from both

d) None of these

**Question 9:** The simple interest at the rate of 8% on the amount Rs. 20,000 for 3 months is

a) 400

b) 600

c) 500

d) 200

**Question 10:** If a person draws an interest of 400 on the principal amount of Rs. 4,000 for two years, the percentage of interest is

a) 10

b) 20

c) 5

d) 15

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__Answers & Solutions:__

**1) Answer (C)
**

CP * 110/100 = 220

So, CP = 200

To get a profit of 30%

SP = CP * 130/ 100 = 200 * 130/ 100 = 260 Rs.

**2) Answer (B)
**

Discount rate = 500* 100/6000= 8.33%

**3) Answer (C)
**

x * 1.05 * 1.05 – x * 1.05 = 420

implies x = 8000 Rs.

**4) Answer (B)
**

A’s profit = 10,000 x 9 x r/100

B’s profit = 18000 x t x r/100

But the profits are same so,

10,000 x 9 x r/100 = 18000 x t x r/100

so, t = 5 months.

**5) Answer (A)**

P x R X T / 100 is the simple interest

So, P x (R+3) x 2/100 – P x R x 2/ 100 = 450

Solving for P, we get P = 7500 Rs.

6) Answer (C)

$ P (1 + .05) ^ {3}$ – P= 630.5

Solving for P, we get P = 4000

**7) Answer (b)
**

The selling price for the first shopkeeper = 500 x .85 x .9 = 500 x .765

The selling price for the second shopkeeper = 500 x .91 x .84 = 500 x .7644

So, the customer benefits more from second shopkeeper.

**8) Answer (B)
**

The selling price for the first shopkeeper = 500 x .85 x .9 = 500 x .765

The selling price for the second shopkeeper = 500 x .91 x .84 = 500 x .7644

So, the customer benefits more from second shopkeeper.

**9) Answer (A)
**

S.I=P x r x t/100 , t in years

=(20,000 x 8 x 3)/( 100 x 12)=400

**10) Answer (C)**

Simple Interest=Principal×time×rate/100

=> 400=4000×2×r/100

∴r = 5

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