5.80 Passing scores Suppose you need a score of 70 out of 100 to pass an exam....
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5.80 Passing scores Suppose you need a score of 70 out of 100 to pass an exam. Let B denote the event you score at least 85 and D denote the event you pass the exam.
Assume P1B2 = 0.3 and P1D2 = 0.7.
a. Find P(B and D). When an event B is contained within an event D as here, explain why P(B and D) = P(B).
b. Find P(B or D). When an event B is contained within an event D, explain why P1B or D2 = P1D2.
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Gabriela Rosalía Castro
I have worked with very different types of students, from little kids to bussines men and women. I have thaught at universities, schools, but mostly in private sessions for specialized purpuses. Sometimes I tutored kids that needed help with their classes at school, some others were high school or college students that needed to prepare for an exam to study abroud. Currently I'm teaching bussiness English for people in bussiness positions that want to improve their skills, and preparing and ex-student to pass a standarized test to study in the UK.
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Related Book For 
Statistics The Art And Science Of Learning From Data
ISBN: 9781292164878
4th Global Edition
Authors: Alan Agresti, Christine A. Franklin, Bernhard Klingenberg
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