二项分布概率公式简介：If she really had to choose between herself and Su Can, Cheng Keshu would only choose Su Can. Just like between Cheng Keshu and Liu Lei, Li Yun would also choose the latter.
If she really had to choose between herself and Su Can, Cheng Keshu would only choose Su Can. Just like between Cheng Keshu and Liu Lei, Li Yun would also choose the latter.
