Probability Concepts with and without Replacement

This tutorial explains the concept of probability with and without replacement using marbles. It begins by defining the terms and setting up a problem with red, green, and blue marbles. The video then calculates the probability of drawing marbles in a specific order with replacement, followed by calculations without replacement. The tutorial concludes with a comparison of the two methods and a discussion on probability notation, emphasizing the importance of understanding the differences in probability outcomes.

What does 'without replacement' mean in probability?

• Not putting the item back after drawing

• Drawing items with eyes closed

• Drawing two items at once

• Putting the item back after drawing

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CCSS.1.MD.C.4

How many red marbles are there in total?

• 4

• 5

• 6

• 7

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CCSS.7.SP.C.7B

What is the probability of picking a red marble with replacement?

• 0.27

• 0.33

• 0.44

• 0.40

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CCSS.7.SP.C.7A

When calculating probability with replacement, what remains constant?

• The color of marbles

• The number of marbles

• The denominator

• The numerator

What is the probability of picking a green marble without replacement after a red one?

• 0.40

• 0.33

• 0.29

• 0.27

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CCSS.7.SP.C.7B

How does the denominator change in probability without replacement?

• It increases by 1

• It decreases by 1

• It doubles

• It remains the same

What is the probability of picking a blue marble without replacement after a red and green one?

• 0.27

• 0.38

• 0.29

• 0.33

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CCSS.HSS.CP.A.5

Why is there a difference in probability between with and without replacement?

• Because the marbles are heavier

• Because the color of marbles changes

• Because the marbles are lighter

• Because the number of marbles changes

What is a common issue with probability notation?

• It is too simple

• It is confusing

• It is too colorful

• It is too short

What should you do to better understand probability concepts?

• Ignore the notation

• Watch more tutorials

• Skip the exercises

• Translate the notation