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The population of a town is 15000. It increases by 10 percent in the first year and 20 percent in the second year. But in the third year it decreases by 10 percent. What will be the population after 3 years.
  • a)
    16820
  • b)
    15820
  • c)
    17820
  • d)
    19820
  • e)
    None of these
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
The population of a town is 15000. It increases by 10 percent in the f...
Answer – c) 17820 Explanation : 15000*(11/10)*(12/10)*(9/10) = 17820
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Most Upvoted Answer
The population of a town is 15000. It increases by 10 percent in the f...
Given:
Initial population = 15000
Increase in first year = 10%
Increase in second year = 20%
Decrease in third year = 10%

To find:
Population after 3 years

Solution:
1) Calculate the population after the first year:
Population after first year = 15000 + (10/100)*15000
= 15000 + 1500
= 16500

2) Calculate the population after the second year:
Population after second year = 16500 + (20/100)*16500
= 16500 + 3300
= 19800

3) Calculate the population after the third year:
Population after third year = 19800 - (10/100)*19800
= 19800 - 1980
= 17820

Therefore, the population after 3 years is 17820. Hence, option (C) is the correct answer.
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