Lesson
Basic Probability
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josephine_miller_07539
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• Slide 1
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Basic Probability

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• Slide 2
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Probability is the study of chance - the likelihood of an event happening.

• There's a fifty percent chance of snow today.

• She has one chance in ten of winning the lottery.

• Chances are five to one that the package will arrive today.

• Slide 3
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The word chance indicates lack of control over what actually happens.

Subtitle
• Question 4
60 seconds
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Q.

The pointer on the spinner can stop either on a shaded or an unshaded section.

The spinner is divided into how many sections?

12
• Question 5
60 seconds
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Q.

The pointer on the spinner can stop either on a shaded or an unshaded section.

The pointer is more likely to stop on which type of section (shaded or unshaded)?

• Question 6
30 seconds
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Q.

Suppose you spin the pointer 100 ties. Which phrase bet describes the number of times the pointer is likely to stop on a shaded section?

Fewer than 50

Exactly 50

More than 50

• Slide 7
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Jerri remembers that 4, 6, and 9 are the three numbers of her locker combination, but she cannot remember the order.

Can you make a list of the possible combinations?

• Slide 8
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Using the numbers 4, 6, and 9, we can make the following list of possible combinations:

• 4-6-9

• 4-9-6

• 6-4-9

• 6-9-4

• 9-4-6

• 9-6-4

• Question 9
30 seconds
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Q.

Using the list from the last page, which phrase describes Jerri's chance of choosing the correct combination on her first try?

1 chance in 3

1 chance in 6

1 chance in 9

• Question 10
30 seconds
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Q.

There are three bags in front of you. One contains candy. The other two contain sand. What are your chances of choosing the bag that contains candy?

Not very likely

very likely

a sure thing

• Question 11
30 seconds
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Q.

Suppose on your first try you get a bag that contains sand, so you throw it away. Which phrase tells your chances of choosing the bag of candy on your second try?

1 chance in 1

1 chance in 2

1 chance in 3

• Question 12
60 seconds
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Q.

Colin puts cards with the numbers 1 - 40 written on them in a bag. Maggie draws a card without looking. What is the probability of Maggie drawing a card that is divisible by 3? Fill in the blank : ____ chances in 40.

13
• Question 13
60 seconds
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Q.

Colin puts cards with the numbers 1 - 40 written on them in a bag. Maggie draws a card without looking. What is the probability of Maggie drawing a card that is divisible by 4? Fill in the blank : ____ chances in 40.

10
• Question 14
60 seconds
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Q.

Colin puts cards with the numbers 1 - 40 written on them in a bag. Maggie draws a card without looking. What is the probability of Maggie drawing a card that is divisible by 5? Fill in the blank : ____ chances in 40.

8
• Question 15
30 seconds
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Q.

Colin puts cards with the numbers 1 - 40 written on them in a bag. Maggie draws a card without looking. Which is Maggie most likely to draw? A number that is....