Lesson 7.1: Likelihood and Probability

​Lesson 7.1

Understand Likelihood and Probability​

Some text here about the topic of discussion

​How to convert fractions to percents:

​a. 1/2

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b. 3/8

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c. ​7/12

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​How to go from fraction to decimal to percent:

​We already know how to go from a fraction to a decimal...

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Step 1: Divide numerator by denominator (takes you from fraction to decimal.)​

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Step 2: Multiply decimal by 100 (takes you from a decimal to a percent.)

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Ex: Convert 7/20 into a percent​

Definitions:

​Outcomes: All of the different results that are possible.

Ex: When rolling a dice you have 6 outcomes (1,2,3,4,5,6)​

​Probability: The chance each outcome has of happening.

Ex: When rolling a dice you have a 1 in 6 chance of rolling a 1.

We write probability as either a ratio, a fraction or a percent.

(1:6,​ 1/6 or 17%)
Likelihood: How probable it is an event will occur.
Ex: impossible, highly unlikely, unlikely, as likely as not, likely, highly likely, certain.

Subject | Subject

Some text here about the topic of discussion

Common Probability Items:

​Dice:

a. Usually 6 sided unless told otherwise

Spinner: 

a. You will be told how many sides

Number Cube:

a. Same as a dice

Marbles:

a. You will be told the number in the bag

Deck of Cards:

a. A deck has 52 cards, each suit has 13 cards

​A spinner has 8 equal sides, 3 are blue, 1 is pink 2 are yellow and 2 are red. What is the probability it will land on each side?

Multiple Choice

A spinner has 5 equal sides. 2 sides are blue, 2 sides are green and 1 side is red. What is the probability it will land on red?

• 1/2

• 2/5

• 4/5

• 1/5

Multiple Choice

A spinner has 8 different equal sides. What is the probability it will land on each side?

• 8

• 100%

• 1/8

• 8/8

​A box contains 4 equal sized cards labeled 1, 3, 5, 7

​a. What is the probability you will choose a card labeled 4?

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​b. What is the probability you will choose a card with a number less than 6?

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c. ​What is the probability you will choose a card with an odd number?

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Multiple Choice

A box contains 4 cards labeled 2, 4, 6, 8. What is the probability you will choose a number less than 7?

• 1/4

• 3/8

• 3/4

• 100%

​There are 7 marbles in a bag, 3 are yellow, 2 are blue and 2 are red.

​1. Is there a higher chance you will choose a yellow or blue marble?

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2. Is there a higher chance you will choose a red or green marble?

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3. Is there a higher chance you will choose a blue or red marble?​

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Multiple Choice

There are 9 marbles in a bag, 5 are red, 2 are blue and 2 are green. Is there a higher chance you will choose a green marble or a blue marble?

• Green

• Blue

• Equal chance for both

Multiple Choice

There are 10 marbles in a bag. 4 are green, 2 are red, 3 are blue and 1 is pink. Is it more likely you will choose a red marble or a blue marble?

• Red

• Blue

• Equal chance of both.

​Conclusion: Write two complete sentences about what you learned.