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### Course: Precalculus>Unit 7

Lesson 6: Using matrices to manipulate data

# Using matrices to manipulate data: Game show

In other videos, we saw how we can use matrices to represent real-world situations. Once we do that, we can also manipulate the matrices (using common matrix operations like addition, subtraction, and scalar multiplication) to reveal more information about the context. Here, we manipulate matrices that represent the possible prizes in a game show. Created by Sal Khan.

## Want to join the conversation?

• "We're told, at the beginning of each episode of a certain game show, each contestant picks a certain door out of three doors. Then the game show host randomly picks one of the two prize bundles. After each round, each contestant receives a prize based on the door they picked and the bundle the host picked."
Why is this so confusing?