1st Lesson of MStat Preparatory course

今日係第一堂嘅 Preparatory course。講明係 Preparatory course，內容就梗係一d學過嘅嘢啦。好似﹕Set notations and set operatios, Simple Probability and Conditional Probability, Counting (Combination and Permutation)

唔算好難，唔係唔係好記得啫。 =p