An event is something that happens. For example flipping a coin, spinning a spinner, choosing a letter, are examples of events.
"Mary flips a coin three times" has three events. Each time you flip a coin it is an event.
Each event has a likelihood, or probability. Each probability is a fraction between 0 and 1.
If the probability is 0 then the event is impossible. If the probability is 1 then the event will always happen.
To find the probability of an event write a fraction where the numerator is how many ways you can get your event to happen.
The denominator of this fraction is the total possible outcomes (all the ways that things may turn out).
To find the probability of two events find the probability of each event, then multiply the fractions you get. Independent events are events where the probability of first event does not affect the probability second.
For example spinning a spinner will not affect the outcome of flipping a coin. These are independent events.
The following video shows how to find the probability of independent events:
Dependent events are events where the probability of first event does affect the probability of second. For example if we have a bag of letters, choose a letter don't put it back and choose another, when we choose the second time there are less letters so the total possible outcomes changes. This is an example of dependent events.
The following video shows how to find the probability of dependent events:
The above examples are examples of theoretical probability (tells us what will probably happen in theory).
Sometimes we may do an experiment to find out how likely an event will occur. This is called experimental probability. Sometimes these two types of probabilities will have a different fraction.
The following video shows how to find experimental probability:
What are independent events?
What are dependent events?
What is theoretical probability?
What is experimental probability?
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An event is something that happens. For example flipping a coin, spinning a spinner, choosing a letter, are examples of events.
"Mary flips a coin three times" has three events. Each time you flip a coin it is an event.
Each event has a likelihood, or probability. Each probability is a fraction between 0 and 1.
If the probability is 0 then the event is impossible. If the probability is 1 then the event will always happen.
To find the probability of an event write a fraction where the numerator is how many ways you can get your event to happen.
The denominator of this fraction is the total possible outcomes (all the ways that things may turn out).
To find the probability of two events find the probability of each event, then multiply the fractions you get.
Independent events are events where the probability of first event does not affect the probability second.
For example spinning a spinner will not affect the outcome of flipping a coin. These are independent events.
The following video shows how to find the probability of independent events:
Dependent events are events where the probability of first event does affect the probability of second. For example if we have a bag of letters, choose a letter don't put it back and choose another, when we choose the second time there are less letters so the total possible outcomes changes. This is an example of dependent events.
The following video shows how to find the probability of dependent events:
The above examples are examples of theoretical probability (tells us what will probably happen in theory).
Sometimes we may do an experiment to find out how likely an event will occur. This is called experimental probability. Sometimes these two types of probabilities will have a different fraction.
The following video shows how to find experimental probability:
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