Dress like a slut or behave like a slut, which would you lean to more?

If you knew a girl would you feel better about her if she dressed racy, minis, tube tops, skinny jeans, very low necklines, no bra, etc, but was a near straight ‘A’ student, rather shy, seldom dated and did not fool around, or would you feel better about her if she wore frumpy sweat tops, over-sized t-shirts, baggy jeans, always in a bra etc, was a decent ‘C’ student but got around a lot (sexed up just about any breathing boy in front of her), and was as far from being a virgin as the Pope is to being a hit man?