It is given that the probability of winning a game is `(3)/(7)`. What is the probability of lossing the game.

Answer

To find the probability of losing the game when the probability of winning is given, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Total Probability**:
The total probability of all possible outcomes (winning and losing) in a game is always equal to 1.

\[ P(\text{Winning}) + P(\text{Losing}) = 1 \]

2. **Identify the Given Probability**:
We are given that the probability of winning the game is

\[ P(\text{Winning}) = \frac{3}{7} \]

3. **Set Up the Equation**:
Substitute the given probability into the total probability equation:

\[ \frac{3}{7} + P(\text{Losing}) = 1 \]

4. **Isolate the Probability of Losing**:
To find the probability of losing, we can rearrange the equation:

\[ P(\text{Losing}) = 1 - \frac{3}{7} \]

5. **Convert 1 to a Fraction**:
To perform the subtraction, we can express 1 as a fraction with a denominator of 7:

\[ 1 = \frac{7}{7} \]

6. **Perform the Subtraction**:
Now we can subtract the fractions:

\[ P(\text{Losing}) = \frac{7}{7} - \frac{3}{7} = \frac{7 - 3}{7} = \frac{4}{7} \]

7. **Conclusion**:
Therefore, the probability of losing the game is

\[ P(\text{Losing}) = \frac{4}{7} \]

### Final Answer:
The probability of losing the game is \(\frac{4}{7}\).