If $30 \%$ students failed in English,$45 \%$ failed in Math,and $25 \%$ failed in both,then what is the percentage of students who passed in both subjects (in $\%$)?

Shruti decided to donate $12 \%$ of her salary to an orphanage. On the day of donation,she changed her mind and donated $Rs. 3150$,which was $75 \%$ of what she had decided earlier. How much is Shruti's salary?

$23 \%$ of $8040 + 42 \%$ of $545 = ? \%$ of $3000$

Due to a price hike of $20 \%$, $4 \text{ kg}$ less sugar is available for $₹ 120$. What is the initial price per kg of sugar (in $\text{ per kg}$)?

In an examination in which full marks were $800,$ $A$ gets $20 \%$ more than $B,$ $B$ gets $20 \%$ more than $C,$ and $C$ gets $15 \%$ less than $D.$ If $A$ got $576,$ what percentage of full marks did $D$ get (approximately) (in $\%$)?

In an examination,$5 \%$ of the applicants were found ineligible and $85 \%$ of the eligible candidates belonged to the general category. If $4275$ eligible candidates belonged to other categories,then how many candidates applied for the examination?