Activity 3: Pushing One Key The keys on a calculator look like this. You are to push one key without looking. What is the probability of pushing?
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Activity 3: Pushing One Key The keys on a calculator look like this. You are to push one key without looking. What is the probability of pushing?
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Fundamental Concept
Probability is the likelihood of achieving the desired outcome.
This is calculated by dividing the number of desired outcomes by the total number of possible outcomes.
The higher the probability, the higher the likelihood of the event occurring.
Illustration
Say you have a jar with 1 red, 1 green, and 1 blue marble. The probability of getting a red marble is 1/3 since there is one red marble (the desired outcome) and there are 3 possible outcomes (being the red, green, and blue marble).
Application
So the probability of pushing a number divisible by 3 is 3/16.
So the probability of pushing a number greater than 6 is 3/16.
So the probability of pushing an operation sign is 4/16 or simply 1/4.
So the probability of pushing a composite number is 4/16 or simply 1/4.
So the probability of pushing a counting number is 9/16.
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