Conditional probability from a two-way table

Conditional probability from a two-way table

Switch to our new maths teaching resources

Slide decks, worksheets, quizzes and lesson planning guidance designed for your classroom.

Play new resources video

Lesson details

Key learning points

  1. In this lesson, we will interpret two-way tables and find conditional probabilities from them.

Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

Loading...

3 Questions

Q1.
There are 10 counters in a bag. 4 counters are green and 6 counters are blue. Two counters are selected at random. If you want to calculate the probability that both are green, what calculation should you do?
An image in a quiz
A
B
Correct answer: C
Q2.
There are 10 counters in a bag. 4 counters are green and 6 counters are blue. Two counters are selected at random. Calculate the probability that you get one of each colour.
An image in a quiz
Correct answer: A
B
C
Q3.
There are 10 counters in a bag. 4 counters are green and 6 counters are blue. Two counters are selected at random. Calculate the probability that you get at least one blue.
An image in a quiz
A
B
Correct answer: C

3 Questions

Q1.
The two-way table shows information about year 7 and 8 students and their participation in some school clubs. How do you find the total number of students?
An image in a quiz
Find the difference between the students in year 7 and the students in year 8 for each club in the table.
Correct answer: Insert a final column and a final row and the add up the total for each column and for each row.
Multiply all the numbers in each row.
Q2.
The two-way table shows information about year 7 and 8 students and their participation in some school clubs. What is the probability that two students picked at random attend debate club?
An image in a quiz
A
Correct answer: B
C
Q3.
The two-way table shows information about year 7 and 8 students and their participation in some school clubs. What is the probability that two students picked at random attend chess club and one is in year 7 and the other in year 8?
An image in a quiz
A
B
Correct answer: C

Lesson appears in

UnitMaths / Higher Probability (Conditional and Further Set Notation)