Question

A village has 4000 literate people in the year 2010 and this number increases by 400 per year. How many literate people will be there till the year 2020? Find a formula to know the number of literate people after n years.

Answer 1

 The number of literate people in the village is in A.P. with the first term 4000 and common difference 400.

\(\therefore\) The number of literate people till the year 2020 will be 7600 and the formula to know the number of literate people after ‘n’ years is (400 n + 3600).