A trader had $1200\, kg$ of rice. He sold a part of it at $5 \%$ profit and the rest at $11 \%$ profit, so that he made a total profit of $7 \%$. How much (in $kg$ ) rice did he sell at $5 \%$ profit?
$900$
$600$
$400$
$800$
A single discount, equivalent to a successive discount of $40 \%$ and $30 \%$ is in $\%$?
$'A'$ buys an article and sells it to $'B'$ at a profit of $10 \%,{ }^{\prime} B ^{\prime}$ sells it to $'C ^{\prime}$ gaining $20 \% .$ If $'C ^{\prime}$ gives $RS.\,924,$ what amount did $'A'$ give? (in $Rs.$)
cost price of $100$ books is equal to the selling price of $60$ books. The gain or loss percentage will be
Amit purchased $13$ chair of $Rs.\, 115$ each and sold all at $Rs.\, 1220.$ Then find the profit or Loss on the transaction
A fruitseller sells mangoes at the rate of $Rs.\, 9$ per $kg$ and thereby loses $20 \% .$ At what price per kg he should have sold them to make a profit of $5 \% ?$ (in $Rs.$)