- Rainy days tend to be more humid than snowfall days.
- Dusty days tend to be less humid than rainy days.
- Snowfall days tend to be less humid than dusty days.
If the first two statements are true, the third statement is.
Rainy days are the most humid, but there is not enough information to compare the wind on the dusty days with the wind on the Snowfall days.
Rainy > Snowfall, and Rainy > Dusty, so we can't compare Snowfall and Dusty days.