There are 6 men and 5 women. They form pairs to play badminton. How many ways are there to form male-female pairs?

Discrete MathematicsCombinatoricsCountingPermutations
2025/5/22

1. Problem Description

There are 6 men and 5 women. They form pairs to play badminton. How many ways are there to form male-female pairs?

2. Solution Steps

We need to find the number of ways to match each of the 5 women with one of the 6 men.
The first woman has 6 choices of men to pair with.
The second woman also has 6 choices of men to pair with.
The third woman also has 6 choices of men to pair with.
The fourth woman also has 6 choices of men to pair with.
The fifth woman also has 6 choices of men to pair with.
However, the problem likely implies each woman is paired with a different man.
In this case,
The first woman can choose from 6 men.
The second woman can choose from the remaining 5 men.
The third woman can choose from the remaining 4 men.
The fourth woman can choose from the remaining 3 men.
The fifth woman can choose from the remaining 2 men.
The total number of ways is 6×5×4×3×26 \times 5 \times 4 \times 3 \times 2.
6×5×4×3×2=30×12×2=30×24=7206 \times 5 \times 4 \times 3 \times 2 = 30 \times 12 \times 2 = 30 \times 24 = 720

3. Final Answer

720

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