Providence is actually a fairly good offensive team. The problem is that they are, at best, average on defense. They give up almost as many points as they score, which is why they are 11-10 overall. Pitt is actually about as efficient on offense as Providence, but is much better on defense.
The big problem of Providence is that they are not a 3-point shooting team. In fact their 3-point shooting percentage is actually slightly below Pitt’s. Of course, Pitt has shot 3s far worse on the road. Providence is actually at its best inside the arc. They are at 52.8% on 2-FGs (31st in the country). Their strength, though, goes right against Pitt’s strength: interior defense. Pitt is holding teams to only 42.9% on 2-FGs (19th).
Providence game notes and Pitt (PDF). A win and Pitt has 20 on the season and a winning record in the Big East Conference for a 5th straight year.