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IB Maths AA SL 4.5 Probability Basics Questions

Practise representing sample spaces and calculating probabilities, complements and expected frequencies from outcomes, events and relative-frequency data.

Syllabus
First assessment 2021
Course
Mathematics: analysis and approaches SL
Level
SL

Exam points

  • Define trial, outcome, sample space, event and relative frequency, representing sample spaces with complete lists or tables.
  • Calculate P(A) = n(A)/n(U), complements and expected numbers of occurrences from a stated experiment or finite sample space.

IB Maths AA SL 4.5 Probability Basics Questions question 1

[Maximum number: 2]

The following cumulative frequency graph shows the monthly income, I dollars, of 2000 families.

Figure for Question IB Maths AA SL 4.5 Probability Basics Questions question 1 — IB Maths AA SL

A family is chosen at random.

Find the probability that this family lives in an apartment.

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