Lesson: Prediction Using Probability Mathematics • 7th Grade

In this lesson, we will learn how to predict the actions of a larger group using a sample and find the expected value.

Lesson Plan

Students will be able to

understand the difference between theoretical and experimental probability,
calculate the expected value of an event,
use experimental probabilities to make inferences about particular scenarios.

Lesson Video

Lesson Explainer

Lesson Worksheet

Q1:

The probability that a biased die will land on an even number is 0.6. If the die is rolled 80 times, how many times is it expected to land on an even number?

Q2:

Jacob plays a card game with his friend and the result can be either win, lose, or draw. Each time they play, the probability that Jacob will win is 0.5, and the probability he will lose is 0.3. If they play 50 games, what is the expected number that will end in a draw?

Q3:

The table shows the results of rolling a die 78 times. Using this information, how many times is the number 2 expected to appear if the die is rolled 234 times?