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For any event AAA, [...]\text{[...]}[...].
A
For any event AAA, 0≤P(A)≤1\boxed{0\le P(A)\le 1}0≤P(A)≤1.
B
Provided P(B)>0P(B)>0P(B)>0, P(A∣B)=P(A∩B)P(B)\boxed{P(A\mid B)=\frac{P(A\cap B)}{P(B)}}P(A∣B)=P(B)P(A∩B).
C
The intersection A∩BA\cap BA∩B.
D
At each split in a tree diagram, the branch probabilities add to 1\boxed{1}1.
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4.1.1 Probability (A-level only) Flashcards
20 flashcards on WJEC A Level Maths 4.1.1 Probability (A-level only): the key formulae, methods and definitions you need to recall for AS Unit 1, AS Unit 2, A2 Unit 3 and A2 Unit 4.