A man bought $4$ dozen eggs at $Rs.\, 24$ per dozen and $2$ dozen eggs at $Rs.\, 32$ per dozen. To gain $20\%$ on the whole, he should sell the eggs at in $Rs.$ per dozen

A man purchased $150$ pens at the rate of $Rs.\, 12$ per pen. He sold 50 pens at gain of $10 \% .$ The percentage gain at which he must sell the remaining pens so as to gain $15 \%$ on the whole outlay is........$\%$

The cost price of $6$ pens is equal to the selling price of $4$ pens. Find the profit percent.

$A$ and $B$ started a business by investing $Rs.\, 3,50,000$ and $Rs.,1,40,000$ respectively. A gets $20\%$ of the yearly profit for managing the business. Thereafter the profit is divided in the ratio of the capital. If $A$ receives totally $Rs.\,38,000$ more than $B$ at the end of a $year,$ then the profit is (in $Rs.$)

A man sold two watches for $Rs.\,3750$ each. On one he gained $5 \%,$ and on the other, he lost $5 \% .$ What was his total gain or loss percentage$?$

List price of a book is $Rs.\,100.$ A dealer sells three such books for $Rs.\, 274.50$ after allowing discount at a certain rate. Find the rate of discount in $\%$