Probability and Problem Solving

This video tutorial covers Lesson 14, which is divided into two parts: solving and writing one-step word problems about parts of a whole, and understanding probability. The first part focuses on using fractions and percents to solve problems, while the second part introduces probability concepts, including the probability of events, complementary events, and examples using marbles, a number cube, and a spinner.

What are the two main topics covered in Lesson 14?

• Parts of a whole and probability

• Probability and algebra

• Geometry and algebra

• Parts of a whole and geometry

What is the new aspect of solving one-step word problems in this lesson?

• Using decimals

• Writing equations

• Using algebra

• Using geometry

In the example problem, what fraction of students did not attend the game if 2/3 attended?

• 2/3

• 1/2

• 1/3

• 1/4

If a speaker is 71% full, what percent is empty?

• 29%

• 50%

• 71%

• 100%

What does a probability of zero indicate?

• An event is unlikely to happen

• An event is impossible to happen

• An event is certain to happen

• An event is equally likely to happen

How are probabilities typically expressed?

• As percentages

• As fractions or decimals

• As whole numbers

• As integers

What is the probability of an event that is equally likely to happen?

• 0

• 1/2

• 1

• 1/4

How do you calculate the probability of picking a red marble from a bag with 4 red and 5 blue marbles?

• 4/9

• 5/9

• 1/2

• 1/9

What is the probability of picking a blue marble from the same bag?

• 1/9

• 1/2

• 5/9

• 4/9

What is the probability of picking a green marble from the bag?

• 1

• 1/2

• 1/9

• 0