A man sells two articles, each for $Rs.\,640.$ He earns $20 \%$ profit on the first, and $40 \%$ profit on the second. Find his overall percent profit.
$29 \frac{1}{2}$
$28 \frac{1}{2}$
$29 \frac{3}{13}$
None of these
Nutan pays $Rs.\, 2140$ for $3$ calculator and $4$ Pen while he pay $Rs.\, 1355$ for an additional calculator and $5$ Pen. Then what he paid for Calculator only in $RS.$?
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
Ram sold two horses at the same price. In one he gets a profit of $10 \%$ and in the other he gets a loss of $10 \% .$ Then Ram gets
Seema purchased an item for $Rs.\, 9600$ and sold it for loss of $5$ percent. From that money she purchased another item and sold it for gain of $5$ percent. What is her overall gain/loss?
Successive discounts of $10 \%, 12 \%$ and $15 \%$ amount to a single discount of