The total number of elements is 2+2=4. Since we have 2 silver earrings, we get
[tex]P(two\text{silver earrings)}=\frac{1}{4}+\frac{1}{4}=\frac{2}{4}=\frac{1}{2}[/tex]the, the probability to get two silver earrings is 1/2, which is equivalent to 0.5.
