$A$ shopkeeper gains $17 \%$ after allowing a discount of $10 \%$ on the marked price of an article. Find his profit percent if the article is sold at the marked price allowing no discount. (in $\%$)

$A$ trader sells his table at a profit of $15 \%$ and the chair at a loss of $7 \frac{1}{2} \%,$ but on the whole he gains $Rs. 50.$ If he sells the table at a loss of $7 \frac{1}{2} \%,$ and the chair at a profit of $15 \%,$ then he neither gains nor loses. Find the cost price of the table.

The cost price of a table is $Rs. 3,200$. $A$ merchant wants to make $25\%$ profit by selling it. At the time of sale,he declares a discount of $20\%$ on the marked price. The marked price (in $Rs.$) is

Mohit purchased $40 \, kg$ of wheat at $Rs. 12.50$ per $kg$ and $25 \, kg$ of wheat at $Rs. 15.10$ per $kg$. He mixed the two qualities of wheat for selling. At what rate should it be sold to gain $10 \%$? (in $Rs.$)

At a village trade fair,a man buys a horse and a camel together for $Rs. 51,250$. He sold the horse at a profit of $25\%$ and the camel at a loss of $20\%$. If he sold both the animals at the same price,then the cost price of the cheaper animal was $Rs.$ .........

The cost price of $20$ articles is the same as the selling price of $x$ articles. If the profit is $25 \%$,then the value of $x$ is: