Out of $8000$ candidates, $60\%$ were boys. If $80\%$ of the boys and $90\%$ of the girls passed the exam, find the number of candidates who failed.

In an exam, $\frac{1}{4}$ of the students failed both in English and Maths, $35\%$ of students failed in Maths and $30\%$ failed in English. Find the percentage of students who failed in any of the subjects.

In an exam, $\frac{1}{4}$ of the students failed both in English and Maths, $35\%$ of students failed in Maths and $30\%$ failed in English. Find the percentage of students who passed in both subjects.

In an exam, $\frac{1}{4}$ of the students failed both in English and Maths, $35\%$ of students failed in Maths and $30\%$ failed in English.

If the number of students who failed only in English was $25$, find the total number of students.

In a sale, a shop reduces all its prices by $15\%$. Calculate the cost of an article which was originally priced at $₹40$. Give the answer in $₹$.

In a sale, a shop reduces all its prices by $15\%$. Calculate the original price of an article which was sold for $₹ 20.40$. Give the answer in $₹$.