A fruit vendor buys $10$ bananas for $Rs.\, 14$ and sells them at $12$ for $Rs.\,15$. Find his percentage gain or loss.

Kunal bought a suitcase with $15 \%$ discount on the labelled price. He sold the suitcase for $Rs$ $2880$ with $20 \%$ profit on the labelled price. At what price did he buy the suitcase? (in $Rs.$)

In these questions, two equations mabered $I$ and $II$ are given. You have to solve both the equations and mark the appropriate option.

$I.$ $2 x^{2}-11 x+15=0$

$II$. $2 y^{2}-11 y+14=0$

Sasha goes to a shop to buy a sofa set and a center table. Ske bargins for a $10 \%$ discount on the center table and and $25 \%$ discount on sofa set. However, the manager, by mistake, interchanged the discount percentage figures while making the bill and Sasha paid accordingly. When compared to what she should pay for her purchases, what percentage did Sasha pay extra given that the center table costs $40 \%$ as much as the sofa set.

If the selling price of an article is $\frac{4}{3}^{rd}$ of its cost price the profit in the transaction is $\%$

A man bought apples at the rate of 6 for $Rs.\,20$ and sold them at $4$ for $Rs.\, 16.$ His estimated profit $\%$ is