The general addition law (AQA GCSE Statistics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does P(A) represent in a Venn diagram?
What does P(A) represent in a Venn diagram?
Probability of A occurring
What is P(A and B) in a Venn diagram?
What is P(A and B) in a Venn diagram?
Intersection of A and B
What does P(A or B) include?
What does P(A or B) include?
A, B, or both
What is the formula for P(A or B)?
What is the formula for P(A or B)?
P(A) + P(B) - P(A and B)
In a group of 50, 21 own a smartphone, 15 own a tablet, and 6 own both. What is P(S or T)?
In a group of 50, 21 own a smartphone, 15 own a tablet, and 6 own both. What is P(S or T)?
0.6
If P(A) = 0.4, P(B) = 0.5, and P(A and B) = 0.2, what is P(A or B)?
If P(A) = 0.4, P(B) = 0.5, and P(A and B) = 0.2, what is P(A or B)?
0.7
What must you do when applying the general addition law?
What must you do when applying the general addition law?
Subtract P(A and B)
Why are Venn diagrams useful in probability?
Why are Venn diagrams useful in probability?
They visualize overlapping events
What should you do first in a general addition law problem?
What should you do first in a general addition law problem?
Identify what you're looking for
How should probabilities be expressed?
How should probabilities be expressed?
As fractions or decimals