SOLUTION
From the diagram, the total outcome is 4
Probability of spinning A is
[tex]\begin{gathered} \frac{possible\text{ outcome for A}}{\text{total outcome }} \\ \frac{1}{4} \end{gathered}[/tex]
Probability of spinning B is
[tex]\begin{gathered} \frac{possible\text{ outcome for B}}{\text{total outcome }} \\ \frac{1}{4} \end{gathered}[/tex]
So probability of spinning A or B becomes
[tex]\begin{gathered} \frac{1}{4}+\frac{1}{4} \\ \frac{2}{4} \\ =\frac{1}{2} \end{gathered}[/tex]
Hence the answer is
[tex]\frac{1}{2}[/tex]
