Question

Fill in the blank:

$$\begin{array}{ccccc}Price& 100& 75& 50& 25\\ Number& 60& 80& & 240\end{array}$$
Answer = ___

Answer 1

According to the given details in the table, we know that it's an inverse proportion, therefore, let the blank be $y$.
$\therefore$ The equation formed will be $100\times 60=75\times 80=25\times 240=50\times y$

$\therefore$ $50\times y=100\times 60$

$\to$ $y=\frac{100\times 60}{50}$

$\to$ $y=120$