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Calculating Probabilities If a set of events have an equal chance of occurring, it is possible to calculate probabilities. For example, you can calculate.

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Presentation on theme: "Calculating Probabilities If a set of events have an equal chance of occurring, it is possible to calculate probabilities. For example, you can calculate."— Presentation transcript:

1 Calculating Probabilities If a set of events have an equal chance of occurring, it is possible to calculate probabilities. For example, you can calculate the probability of rolling a 4 on a die because the 4 has the same chance of occurring as the other numbers.

2 Calculating Probabilities If you can calculate probabilities, you can use this simple method: The probability of an event happening The number of results you want The number of possible results =

3 Calculating Probabilities If you can calculate probabilities, you can use this simple method: The probability of rolling a 4 on a normal die 1 side with the number 4 6 possible sides =

4 Calculating Probabilities If you can calculate probabilities, you can use this simple method: The probability of rolling a 4 on a normal die 1616 =

5 Calculating Probabilities Which of these statements are true about the word MATHEMATICAL? The probability of picking a vowel is 50 % because a letter picked is either a vowel or it isnt. The probability of picking a vowel is 5 because there are 5 vowels out of letters. False, there are less vowels than consonants. True

6 Calculating Probabilities car walk bus bike other How class 6b get to school Decide which of these statements are true. This spinner represents all of class 6B

7 Calculating Probabilities car walk bus bike other The chance of landing on a person who said bike or car is the same as landing on a person who walks. The chance of getting bike is the same as getting car True False

8 Calculating Probabilities car walk bus bike other The chance of getting car is 1 2 The chance of getting car is 25 % False True


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