Question

the population of village is 30000 the population was increased in the first year by 10% and decreased by 15% in second year find the population at the end of the two years​

Answer 1

Answer:

12,540

  Population after 3 years =10000(1+10010)(1+10020)(1−1005)

=10000×1011×56×2019=12540

Step-by-step explanation:

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Answer 2

Answer:“The increase in population first year = 15%

The increase in population second year = 8%

The decrease in population third year = 12 (1/2)%

The population at the end of the third year = 26,082,

Calculation:

Let the initial population be x.

The population at the end of first year = x × 115%

The population at the end of second year = (x × 115%) × 108%

The population at the end of third year = (x × 115%) × 108% × [100 - (25/2)]% = 26082

(x × 115%) × 108% × [100 - (25/2)]% = 26082

x × (115/100) × (108/100) × (175/200) = 26082

Simplifying and solving,  

x = 24,000

∴ The initial population is 24,000.

Step-by-step explanation: