We can reduce random errors by

Options

A. Taking large number of observations
B. Corrected zero error
C. By following proper technique of experiment
D. Both (1) & (3)

Answer

To solve the question "We can reduce random errors by", let's analyze the options provided and understand how random errors can be minimized.

### Step-by-Step Solution:

1. **Understanding Random Errors**:
Random errors are unpredictable fluctuations that can occur during measurements due to various factors such as environmental changes, instrument limitations, or human error. They can vary from one measurement to another.

2. **Evaluating the Options**:
- **Option 1: Taking a large number of observations**:
This approach helps in averaging out the random errors. When multiple measurements are taken, the random errors tend to cancel each other out, leading to a more accurate result.
- **Option 2: Corrected zero error**:
This option pertains more to systematic errors rather than random errors. Correcting zero error is important for accurate measurements but does not specifically address random errors.
- **Option 3: Following proper technique of experiment**:
While following proper techniques can minimize errors in general, it primarily helps in reducing systematic errors. Random errors are inherently unpredictable and cannot be completely eliminated by technique alone.
- **Option 4: Both 1 and 3**:
While taking a large number of observations (Option 1) is effective in reducing random errors, Option 3 does not specifically address random errors.

3. **Conclusion**:
The best way to reduce random errors is by taking a large number of observations. Thus, the correct answer is **Option 1**.

### Final Answer:
We can reduce random errors by **taking a large number of observations** (Option 1).

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