Normal Distributions Exam Question - IB AI & AA SL Mathematics - Topic 4

IB AA SL and AI SL Normal Distribution question, based on a past paper question. We see how to use the normal cdf function to calculate a probability, which corresponds to an area under the bell curve (SL 4.9 in AI and AA Syllabus) . We also see how to calculate the expected value (SL 4.5 in AI and AA syllabus) and finally we see how to calculate probabilities using the conditional probability formula (SL 4.6 in AI and AA syllabus).