Question

d) The population of a town decreases every year due to migration. The present
population of the town is 1,71,000. Last year, the migration was 5% and the year
before last, it was 10%. What was the population of the town two years ago?​

Answer 1

Answer:

Answer

As per question,

Suppose, two year ago the population =P

We know that,

A=P(1+100R)(1−100R)

So,

⇒631680=P(1−1004)/(1−1006)

⇒631680=P×2524×5047

⇒P=24×4763/1680×25×50=700000

Answer 2

Answer:

197505

Step-by-step explanation:

Towns populations is 171000

migrants populations is 5%

So, total population is 105/100 × 171000

= 179550 total population

total population before two year are

110/100 × 179550 = 197505