Question

The population of a variety of tiny bush in an experimental field increased by 10% in the first year, increased by 8% in the second year but decreased by 10% in the third year. If the present number of bushes in the experimental field is 26730, then the number of bushes in the beginning was:

Answer 1

we have to follow this rules in this solution

A=p ( 1+r/100) and p= A(1+r/100)

no.of the bushes in the beginning = 26730 /(1+10/100) ( 1+ 8/100) (1-10/100)

= 26730/11/10* 27/25 * 9/10

= 26730* 10/11* 25/27* 10/9

= 2500