# Using matrices to represent data: Payoffs | Matrices | Precalculus | Khan Academy | Summary and Q&A

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February 28, 2021
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Using matrices to represent data: Payoffs | Matrices | Precalculus | Khan Academy

## TL;DR

Analyzing a scoring system for a game similar to rock paper scissors and determining the best strategy to maximize points.

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### Q: What is the objective of the game discussed in the video?

The objective is to determine the best strategy for Violet to maximize her point total when playing against Lennox in an elaborated version of rock paper scissors.

### Q: How is the scoring system represented in the matrix?

The matrix shows the number of points Violet receives. A negative number means Lennox gets those points. The rows represent Violet's chosen shape, and the columns represent Lennox's chosen shape.

### Q: What happens if both players choose the same shape?

If both players choose the same shape, no points are awarded to either player in that round.

### Q: What combination of shapes results in Violet winning and receiving positive points?

If Violet chooses rock and Lennox chooses scissors or if Violet chooses paper and Lennox chooses rock, Violet wins and receives two points.

### Q: What combination of shapes results in Lennox winning and receiving positive points?

If Lennox chooses rock and Violet chooses scissors, Lennox wins and receives three points. If Lennox chooses paper and Violet chooses scissors, Lennox wins and receives one point.

### Q: How is the best strategy determined based on the matrix?

By calculating the expected values for each shape choice, it is determined that Violet should choose paper to maximize her chances of getting the most points when playing against Lennox.

## Summary & Key Takeaways

• The video discusses an elaborated version of rock paper scissors where different shape combinations earn different point values for the winner.

• The task is to complete a matrix representing the scoring system, with rows representing Violet's chosen shape and columns representing Lennox's chosen shape.

• By calculating the expected values, it is determined that Violet should choose paper to maximize her chances of getting the most points when playing against Lennox.