Answer :

To find: Present population of the village


Given: (i) Three years back population - 10000


(ii) Time – 3 years


(iii) Rate – 20% per annum


Number of people migrated on the very first year is 20% of 10000



People left after migration in the very first year = 10000 – 2000


= 8000


Number of people migrated in the second year is 20% of 8000



People left after migration in the second year = 8000 – 1600


= 6400


Number of people migrated in the third year is 20% of 6400



People left after migration in the third year = 6400 – 1280


= 5120


Ans) The present population is 5120


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