1
What term describes an event that is certain to occur?
Explanation
A certain event is one that will definitely happen.
2
Which of the following best describes an impossible event?
Explanation
An impossible event is one that cannot occur under any circumstances.
3
When flipping a fair coin, what is the probability of landing on heads?
Explanation
A fair coin has two possible outcomes: heads and tails, so the probability of heads is 1 out of 2.
4
What is the probability of rolling a 3 on a standard six-sided die?
Explanation
There is one favorable outcome (rolling a 3) out of six possible outcomes.
5
If a spinner has 4 equal sections, what is the probability of landing on a specific section?
Explanation
Each section has an equal chance of being landed on, so the probability is 1 out of 4.
6
What does a sample space represent in probability?
Explanation
A sample space is the set of all possible outcomes of a probability experiment.
7
If an event is described as unlikely, what can be inferred about its probability?
Explanation
An unlikely event has a probability less than 0.5, indicating it is less likely than not to occur.
8
In a probability tree diagram, what do the branches represent?
Explanation
Branches in a probability tree diagram represent the different possible outcomes of an event.
9
Expressing probability as a percentage involves converting which of the following?
Explanation
To express probability as a percentage, you convert the fractional probability into a percentage format.
10
What term is used for the ratio of favorable outcomes to the total number of possible outcomes?
Explanation
Probability is defined as the ratio of favorable outcomes to the total number of possible outcomes.
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