Question

a company that sells pocket radios makes a profit of R12000 on the first 500 radios sold. Assuming that all prices remain the same, how much profit do you expect to make on selling 7000 radios?

Answer 1

$$\text {The company makes a profit of 12,000 on the first 500 radios sold.}\\[1 em] \text {If it sold 7,000 devices at the same price.}\\[1 em] \text {Now we are looking at how many 500 are there in the 7,000?}\\[1 em] \frac{7000}{500}=14\\[1 em] \therefore \text {The expected profit from selling 7,000 radios}\\[1 em] =12000 \times 14=\textcolor{blue}{168000}\\[2 em] \text {Another way}\\\\ \\[2 em] \begin{aligned} &12000 \rightarrow &500&\\ &x \rightarrow & 7000&\\ \end{aligned}\\ \therefore x=\frac{12000\times 7000}{500}=\textcolor{blue}{168000}$$