A box contains exactly five chips, three red and two white. Chips are randomly removed one at a time without replacement until all the red chips are drawn or all the white chips are drawn. What is the probability that the last chip drawn is white?
Answer Choices
A. \dfrac{3}{10}
B. \dfrac{2}{5}
C. \dfrac{1}{2}
D. \dfrac{3}{5}
E. \dfrac{7}{10}