A bag contains exactly 18 solid colored buttons: 3 red, 5 blue, and 10 white. What is the probability of randomly selecting 1 button that is not white?
A. [tex] \frac{1}{18} [/tex] B. [tex] \frac{1}{8} [/tex] C. [tex] \frac{4}{9} [/tex] D. [tex] \frac{2}{3} [/tex] E. [tex] \frac{4}{5} [/tex]