Question

A school had 1000 students in the year 2016. If every year the number of students increases by 20% then that will be the strength of the school ib the year 2018 ?

Answer 1

final number = original number (1 + r1/100)(1 + r2/100)  [ where r1 and r2 are rates of increase in both years.
 = 1000(1.2)(1.2) = 1440 (ANS)

Answer 2

if every year increases by 20% . at 2018 the strength is 1400