The price of rice is reduced by $2 \%$. How many kilograms of rice can now be bought for the money which was sufficient to buy $49 \text{ kg}$ of rice earlier?

In an examination,$70 \%$ of the candidates passed in English,$80 \%$ passed in Mathematics,and $10 \%$ failed in both subjects. If $144$ candidates passed in both,the total number of candidates was:

$A$ number is increased by $20 \%$ and then decreased by $20 \%$. What is the final percentage change in the number?

An index of $12$ shares contains,among others,the shares of Vision Power,Vision Infra,and Vision Communication with weightage of $7\%$,$13\%$,and $15\%$ respectively. What is the increase in the prices of other shares,if these three rise by $9\%$,$10\%$,and $4\%$ respectively,while the index rises by $6\%$?

$45 \%$ of $750 - 25 \%$ of $480 = ?$

During one year,the population of a town was increased by $5 \%$ and during the next year,the population decreased by $5 \%$. If the total population is $9975$ at the end of the second year,then what was the population size in the beginning of the first year?