A population of variety of tiny bush in an experiment field increased by 10% in the first year, increased by 8% in the second year but decreased by 10% in third year. If the present number of bushes in the experiment field is 26730, then the number of variety of bushes in beginning was:
A. 35000
B. 27000
C. 25000
D. 36000
Answer: Option C
Solution(By Examveda Team)
Let the number of bushes originally be 100 Number of bushes after one year 100 ==10% (↑) ==> 110 After second year it becomes 110 ==8%(↑) ==> 118.8 After third year, 118.8 ==8%(↓)==> 109.3 Now, according to the question 109.3 = 26730 1 = $$\frac{{26730}}{{109.3}}$$ So, 100 = $$\frac{{26730}}{{109.3}} \times 100$$ = 25000Thus, number of bushes originally was 25000 NOTE:You can take number of bushes originally as x then solve for the x
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Comments ( 2 )
Related Questions on Percentage
A. $$\frac{1}{4}$$
B. $$\frac{1}{3}$$
C. $$\frac{1}{2}$$
D. $$\frac{2}{3}$$
100 = (26730/109.3) *100 = 25000
How? Show me how you did it !
There was 10% decrease after third year and you took 8% in your solution. How?