3.1.3 Exam Question Type 3

These kinds of questions ask you to calculate expected value using probabilities and a bunch of outcomes. Things get further tricky with the use of monetary values where each outcome results in some financial gain or loss.

The following are relevant past exam questions:

(Note: The links will direct you to relevant question in the file on PC only NOT mobile)

2017Q5, 2018Q9, 2016Q29a, 2019Q20, 2010Q26c

Check out the videos below relevant to these questions.

HSC Maths Standard 2019 Question 20 - StudyNinja

by StudyNinja (click to view channel)

Solves Question 20 from Maths Standard 2019 HSC exam (Probability).

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HSC Standard Math Hack | Probability | Can it get easier than this in section 2 of exam?

by StudyNinja (click to view channel)

2018 Question 9 and 2019 Question 20 are similar.

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The past questions above cover most ways expected value questions can be asked. They can be made tricky by combining other question types to make a longer question where calculating expected value is one part of it.