To find the probability of this event we have to divide the favorable outcomes by the total of outcomes:
[tex]P=\frac{favoutcomes}{totaloutcomes}[/tex]In this case, there are only 2 favorable outcomes, which are that both spinner and highlighter are blue or green. There are 18 total outcomes, the probability is:
[tex]P=\frac{2}{18}=\frac{1}{9}[/tex]The answer is 1/9.