Cambridge IGCSE Mathematics practice

exam practice - Determine the probability of combined events, ensuring that events are considered with replacement. Use the following methods where suitable: sample space diagrams, Venn diagrams (limited to two sets), and tree diagrams, where outcomes are noted at the ends of branches and probabilities are indicated alongside the branches. - Probability of combined events

Try the question first, then check the answer and practise the same topic again.

At a glance

Paper

Marks

Topic

Probability of combined events

Exam-style question

Try this first

Paper 2Core or Extended Mathematics2 marks

Calculating probabilities from a bag of colored balls.

Description

A bag contains 4 red balls, 3 blue balls, and 5 green balls. You draw one ball at random, replace it, and then draw a second ball.

a
Calculate the probability of drawing a red ball followed by a green ball.
Your answer
Aim for approximately 2 distinct marking points.
[2]

0 of 1 part answered

Answer every part before opening the mark scheme.

Maths method check

Topic focus: Probability of combined events.
Question style: structured_mathematics.
Reasoning demand: reasoning.
Check the operation, notation, units, and final answer form against the question before moving on.

Common mistake

No common mistake is linked to this question yet.

Flashcard 1 of 6

Press Space to flip, arrows to move

Paper 2Core or Extended Mathematics2 marks

Description

You flip two coins simultaneously. What is the probability of getting at least one head?

a
Calculate the probability of getting at least one head when flipping two coins.
Your answer
Aim for approximately 2 distinct marking points.
[2]