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Four matches are to be played in a chess tournament. In how many ways can result be decided?

Question

Four matches are to be played in a chess tournament. In how many ways can result be decided?

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Solution

To determine the number of ways the results of four matches can be decided in a chess tournament, we can break down the problem as follows:

1. Break Down the Problem

Each match can end in one of three outcomes: Player A wins, Player B wins, or the match ends in a draw. Therefore, for each of the four matches, there are three potential outcomes.

2. Relevant Concepts

The total number of possible outcomes for multiple matches can be calculated using the formula:

Total Outcomes=(Number of Outcomes per Match)Number of Matches \text{Total Outcomes} = (\text{Number of Outcomes per Match})^{\text{Number of Matches}}

In this case, the number of outcomes per match is 3 (win for A, win for B, or draw), and the number of matches is 4.

3. Analysis and Detail

Using the formula:

Total Outcomes=34 \text{Total Outcomes} = 3^4

Calculating 343^4:

34=3×3×3×3=81 3^4 = 3 \times 3 \times 3 \times 3 = 81

4. Verify and Summarize

We calculated the total number of outcomes by considering each match independently. Each match has 3 outcomes, and there are 4 matches, leading to a total of 8181 different ways the results can be decided.

Final Answer

The total number of ways the results of the four matches can be decided is 81 \boxed{81} .

This problem has been solved

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