Question

If $9$ out of $24$ students scored below $75\%$ marks in a test. If the ratio of student scored below $75\%$ marks to the student scored $75\%$ and above marks is $l$:$k$, the find $l+k$

Answer 1

Number of students scored below 75% marks$=9$

Number of students scored 75% and above$=24-9=15$

Ratio of students scored below 75%to the students scored 75% and above$=\frac{9}{15}=\frac{3}{5}=3:5$ comparing with $l:k$

Thus, $l:k=3+5=8$