Answer: 1/8
Explanation:
(W) white (B) black (R) red (BL) blue (BP) blue pants (TP) tan pants
|-------------(B)
|-------------(W)
(TP)------------- |-------------(R)
| |-------------(BL)
| |--------------(B)
| |--------------(W)
(BP)-------------|--------------(R)
|--------------(BL)
From the tree diagram, a white shirt with tan pants is one out of eight possible outcomes, so the probability of getting tan pants and a white shirt is 1/8.