Home › ECZ Grade 12 School Certificate › Mathematics › Probability › Two events are independent. What does knowing th…
Two events are independent. What does knowing that one of them happened tell you about the other?
AThat it happened
BNothing at all
CThat it failed
DAlmost everything
Answer & Solution
Correct answer: B. Nothing at all
1. Events are dependent when knowing about one of them says something about the other.
2. Independent events give no information about one another.
3. So the probability of one event is not affected by whether the other one happened.
4. For dependent events a tree diagram is drawn, because the second stage changes with the first.
_Source: Siyavula Mathematics Grade 11 (Everything Maths, CC BY 4.0), Chapter 10: Probability_
Related questions
A bag holds 5 red beads and 3 blue beads. One bead is drawn and its colour noted, then it A four digit PIN is made from the digits 0 to 9. How many more PINs are possible if digitsTwo events are known to be mutually exclusive. What does that tell you about whether they Why is the fundamental counting principle used instead of a tree diagram for large problemTwo events are described as independent. What does that mean?What does it mean for two events to be mutually exclusive?On a given day the chance of rain is 0.4. When it rains, the chance a match is called off Two ordinary six-sided dice are rolled. What is the probability that the two numbers add u