Getting a grade like a B-plus or a C-minus adds or subtracts a few tenths of a point.

VOA: special.2009.03.05

One thing I can guarantee from past experience in this class, is that the median grade will be a B+.

不过从教学经验看,中间成绩应该是B+

耶鲁公开课 - 博弈论课程节选

So my grade if we both put Alpha is B-, if we both put Beta, was B+.

如果我们都选α我得B-,都选β我得B+

耶鲁公开课 - 博弈论课程节选