Answer: 9/10 probability
Step-by-step explanation:
What you're trying to figure out is how likely the pants you select to not be white. The formula for this sort of thing is:
(How many things fit the probability you're looking for)/(However may there are of the thing total)
Because 9 of the clothes are not white, and would therefore fit the probability you're looking for, you would put 9 at the top (4 blue, 2 black, 3 tan)
Lastly, add all the clothes up total and put that number on the bottom (4 + 2 + 1 + 3 = 10)
Therefore, the answer is 9/10