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Laabri

Open Up - Grade 7 - Mathematics - Unit 8 - Lesson 5

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Last updated 4 months ago
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"Source: Open Up Resouces (Download for free at openupresources.org.)"

Asemmisa {{asɛmmisaAhyɛnsode}}
1.

What is the same about these two experiments? What is different?

  • Selecting a letter at random from the word “ALABAMA”

  • Selecting a letter at random from the word “LAMB”

Asemmisa {{asɛmmisaAhyɛnsode}}
2.

Andre picks a block out of a bag 60 times and notes that 43 of them were green.

What should Andre estimate for the probability of picking out a green block from this bag?(answer as a fraction)

Asemmisa {{asɛmmisaAhyɛnsode}}
3.

Andre picks a block out of a bag 60 times and notes that 43 of them were green.

Mai looks in the bag and sees that there are 6 blocks in the bag. Should Andre change his estimate based on this information?

Asemmisa {{asɛmmisaAhyɛnsode}}
4.

A person suspects a standard number cube is not so standard. He rolls it 100 times, and it lands on a six 40 times. Another person rolls this cube 100 times, and it lands on a six 42 times. A third person rolls the cube 100 times, and it lands on a six 33 times.

Based on the results, is there evidence to help prove that this cube is not a standard number cube?

Asemmisa {{asɛmmisaAhyɛnsode}}
5.

A textbook has 428 pages numbered in order starting with 1. You flip to a random page in the book in a way that it is equally likely to stop at any of the pages.

What is the sample space for this experiment?

Asemmisa {{asɛmmisaAhyɛnsode}}
6.

A textbook has 428 pages numbered in order starting with 1. You flip to a random page in the book in a way that it is equally likely to stop at any of the pages.

What is the probability that you turn to page 45?(answer as a fraction)

Asemmisa {{asɛmmisaAhyɛnsode}}
7.

A textbook has 428 pages numbered in order starting with 1. You flip to a random page in the book in a way that it is equally likely to stop at any of the pages.

What is the probability that you turn to an even numbered page?(answer as a fraction)

Asemmisa {{asɛmmisaAhyɛnsode}}
8.

A rectangular prism is cut along a diagonal on each face to create two triangular prisms. The distance between A and B is 5 inches.

What is the surface area of the original rectangular prism?

Asemmisa {{asɛmmisaAhyɛnsode}}
9.

A rectangular prism is cut along a diagonal on each face to create two triangular prisms. The distance between A and B is 5 inches.

What is the total surface area of the two triangular prisms together?