Tanya has several different ways she likes to walk home. One route takes 20 minutes, two of the routes take 30 minutes, and two take 40 minutes.
Tanya randomly chooses a route to walk home.
What is the probabilty, to the nearest percent, that it will take her 30 min to walk home?
A). 20%
B). 33%
C). 40%
D). 67%