IB Maths AI HL Topic 4: Statistics and probability questions

Exam-style questions in the shape of Paper 1 and Paper 2, with full markschemes. Read the markscheme, or type, photograph or draw your answer and get it marked.

Paper
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Question 1

Paper 2Easy5 marks

A school surveys 50 students about how they travelled to school on a particular day. Of these students, 23 travelled by bus, 19 travelled by train, and 8 used both the bus and the train.

One student is selected at random from the 50 students.

(a)

Find the probability that the student travelled by bus or train.

[2]
(b)

Find the probability that the student travelled by neither bus nor train.

[1]
(c)

Given that the student travelled by bus, find the probability that the student also travelled by train.

[2]

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