A single discount, equivalent to a successive discount of $40 \%$ and $30 \%$ is in $\%$?
$55$
$56$
$57$
$58$
Using net discount formula
$\left[40+30-\frac{40 \times 30}{100}\right]=58 \%$
A vendor buys bananas at $9$ for $Rs. 8$ and sells at 8 for $Rs. 9.$ What will be the profit or loss (in $\%$)?
A man bought $15$ mangoes for a rupee. How many mangoes were sold for a rupee so that there is a loss of $25 \% ?$
A shopkeeper gains the cost of $8$ metres thread by selling $40$ metres thread. Find his gain percent.
A shopkeeper sold an article for $Rs.\, 400$ after giving $20 \%$ discount on the labelled price and made $30 \%$ profit on the cost price. What would have been the percentage profit, had he not given the discount?
A trader mixes $26\, kg$ of rice at $Rs.\, 20$ per $kg$ with $30\, kg$ of rice of another variety at $Rs.\, 36$ per $kg$ and sells the mixture at $Rs$ $30$ per $kg.$ His profit percent is
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