Arithmetichard · Past Paper
The population of a town increases by 10% in first year and decreases by 10% in second year. If population after 2 years is 19800, find original population.
A20000
B19000
C21000
D20500
✓ Correct Answer: A — 20000
Net change = -1%. 99% of x = 19800 => x = 19800 / 0.99 = 20000.
Share this question
More from Arithmetic
- A sum of money invested at compound interest amounts to Rs 4624 in 2 years and Rs 4913 in 3 years. Find the sum.
- What is the simple interest for Rs 100 at 1% for 1 year?
- Selling price of an article is Rs. 240 and profit is 20%. Find the profit.
- If CP = Rs. 60 and Profit = 25%, SP is?
- A student needs 32% marks to pass. He gets 100 marks and fails by 28 marks. What are the total marks?