The number of white balls are n = 6.
Determine the total balls in the bag.
[tex]\begin{gathered} T=6+8+14+12 \\ =40 \end{gathered}[/tex]Determine the probability for chossen ball to be white.
[tex]\begin{gathered} P(W)=\frac{6}{40} \\ =\frac{3}{20} \end{gathered}[/tex]So answer is 3/20.