Lu Nanchen stood at the podium, beginning his lesson with a teaching PowerPoint slide. As today it was someone else, not Yu Ting, who handed in the attendance sheet, his gaze carried a hint of searching as he looked over the students.
"Today we're going to learn about the total probability formula, an important formula in probability theory that transforms the problem of finding the probability of a complex event A into…"
As Lu Nanchen casually lectured from the podium and scanned the class, he spotted Yu Ting sitting in the middle, currently dozing off with her head on her desk.
It was the first time she had been sleepy in class since the beginning of the semester.
There was also a boy sitting next to her, whom he didn't recognize, leaning quite close to her while talking.
"..."
"The total probability formula is, if events B1, B2, B3… Bn form a complete set of events, i.e., they are pairwise…"
...
"Hmm, who is teacher Lu staring at?"
"It looks like it's Yu Ting…"
