The mean proportion of 1.21 and 0.09 is

Options

A. 3.3
B. 0.33
C. 3.03
D. 0.033

Answer

To find the mean proportion of the numbers 1.21 and 0.09, we will follow these steps:

### Step 1: Understand the formula for mean proportion
The mean proportion (or geometric mean) of two numbers \( A \) and \( B \) is given by the formula:
\[ \text{Mean Proportion} = \sqrt{A \times B} \]

### Step 2: Identify the values of \( A \) and \( B \)
In this case, we have:
- \( A = 1.21 \)
- \( B = 0.09 \)

### Step 3: Calculate the product \( A \times B \)
First, we calculate the product of \( A \) and \( B \):
\[ A \times B = 1.21 \times 0.09 \]

### Step 4: Perform the multiplication
Calculating the product:
\[ 1.21 \times 0.09 = 0.1089 \]

### Step 5: Take the square root of the product
Now, we find the square root of the product:
\[ \text{Mean Proportion} = \sqrt{0.1089} \]

### Step 6: Calculate the square root
Calculating the square root:
\[ \sqrt{0.1089} = 0.33 \]

### Conclusion
Thus, the mean proportion of 1.21 and 0.09 is:
\[ \boxed{0.33} \]

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