A factory produces electric bulbs. If 1 out of every 10 bulbs is defective and the factory produces 630 bulbs per day, find the number of defective bulbs produced each day.

Answer

To find the number of defective bulbs produced each day by the factory, we can follow these steps:

### Step 1: Understand the Ratio of Defective Bulbs
The problem states that 1 out of every 10 bulbs is defective. This means that the ratio of defective bulbs to total bulbs is:
\[ \text{Ratio of defective bulbs} = \frac{1}{10} \]

### Step 2: Determine the Total Number of Bulbs Produced
The factory produces a total of 630 bulbs each day.

### Step 3: Set Up the Equation
Let \( x \) be the number of defective bulbs produced each day. According to the ratio, we can set up the following equation:
\[ \frac{x}{630} = \frac{1}{10} \]

### Step 4: Cross Multiply
To solve for \( x \), we will cross-multiply:
\[ 1 \times 630 = 10 \times x \]
This simplifies to:
\[ 630 = 10x \]

### Step 5: Solve for \( x \)
Now, divide both sides by 10 to isolate \( x \):
\[ x = \frac{630}{10} \]
Calculating this gives:
\[ x = 63 \]

### Conclusion
Therefore, the number of defective bulbs produced each day is:
\[ \boxed{63} \]