To get a sum of 4,
We need to establish a proportion
For the first spin
The values are 1, 2, 3, 4, 5,
Second spin 2
The values are 1, 2, and 3
Establishing a proportion
[tex]\begin{gathered} \frac{4}{2}\text{ = }\frac{x}{2} \\ \text{Cross multipy} \\ 4\text{ x 2 = x }\cdot\text{ 2} \\ 8\text{ = 2x} \\ \text{Divide both sides by 2} \\ \frac{8}{2}\text{ = }\frac{2x}{2} \\ x\text{ = 4} \\ \end{gathered}[/tex]