$37 \frac{1}{2} \%$ of $₹ 48$ is:

$1200$ boys and $650$ girls appeared in an examination. If $70 \%$ of boys and $40 \%$ of girls failed,find the approximate percentage of passed students.

$A$ man donates $30\%$ of his wealth to charity. He gives $30\%$ and $25\%$ of the remaining wealth to his wife and son respectively. The rest he divides equally between his three daughters. One of his daughters gets $Rs$ $42$ lakh as her share. What was the man's total wealth (in $Rs$ lakhs)?

$A$ jar contains $10$ red marbles and $30$ green ones. How many red marbles must be added to the jar so that $60 \%$ of the marbles will be red?

One type of liquid contains $20 \%$ water and the second type of liquid contains $35 \%$ water. $A$ glass is filled with $10$ parts of the first liquid and $4$ parts of the second liquid. What is the percentage of water in the new mixture in the glass?

$A, B$,and $C$ invested in a business in the ratio of $3:2:5$ respectively. If $A$ earns $100\%$ more profit than $B$ and $C$ earns $40\%$ more profit than $B$,then what is the share of $B$ in the profit?