In a group of students, $$\frac{1}{5}$$ are aged below 8 years. Of the remaining $$\frac{2}{5}$$ are above 8 years. What fraction of the students are exactly 8 years of age?
$$ \frac{1}{5} $$ of students aged below 8 years
Remaining students = $$\frac{4}{5} $$
$$ \frac{2}{5} $$ of remaining students aged above 8 years
that is $$\frac{8}{25} $$ of the students
$$ \frac{3}{5} $$ of the remaining students are exactly 8 years
that is $$\frac{12}{25} $$ of the students
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