In a class of 40 students, \(\dfrac{1}{5}\) of the total number of students like to eat rice only, \(\dfrac{2}{5}\) of the total number of students like to eat chapati only and the remaining students like to eat both. What fraction of the total number of students like to eat both?
\(\dfrac{2}{5}\)
Rice only: \(\dfrac{1}{5}\times 40=8\). Chapati only: \(\dfrac{2}{5}\times 40=16\). Remaining: \(40-(8+16)=16\Rightarrow \dfrac{16}{40}=\dfrac{2}{5}\).