In an examination $49.3\%$ of total students appeared, passed successfully. If the number of successful candidates are $23128$, how many students appeared (approximate) in the exam?

A tank is filled $10\%$ in one hour and $8\%$ of the water is emptied in the next hour. If it is repeated again, find the percentage of the tank filled with water.

If $20\%$ of man’s salary is paid as rent, $60\%$ are his living expenses and $10\%$ is paid in L.I.C. If he spends remaining $₹ 30$ on the education of the children, find his salary?

A litre of water is evaporated from $6$ litre of sugar solution containing $4\%$ of sugar, find the percentage of sugar in remaining solution?

When the price of cloth were reduced by $25\%$, the quantity of cloth sold increased by $20\%$. What was the effect on gross receipt of the shop?

Chinmoy sold his radio set at $10\%$ loss, If he had sold it for $₹ 45$ more he would have made $5\%$ profit, for how much did he sell the radio?

At what rate of simple interest, a given sum will become twice in $15$ years?

The sum of $₹ 725$ is borrowed at the beginning of a year at simple interest. After $8$ months have passed $₹ 362\frac{1}{2}$ more is borrowed at a rate of interest double that, which the former sum bears at the end of the year, the sum of interest on both loans is $₹ 43.50$, what is the first rate of interest per annum?

The cost price of goods with a bankrupt is $₹ 25500$ and if the goods had realised in their full value, his creditors would have received $85$ paise in the rupee. But $\frac{2}{5}$ of the good were sold at $17\%$ and the remainder at $22\%$ below their cost price. How many paise in a rupee was received by the creditors?