Find the mean of the following numbers : 12,16 , 20 , 24

Answer

To find the mean of the numbers 12, 16, 20, and 24, we will follow these steps:

### Step 1: Write down the numbers
We have the following numbers:
- 12
- 16
- 20
- 24

### Step 2: Calculate the sum of the numbers
We need to add all the numbers together:
\[ 12 + 16 + 20 + 24 \]

Calculating this step by step:
- First, add 12 and 16:
\[ 12 + 16 = 28 \]
- Next, add 20 to the result:
\[ 28 + 20 = 48 \]
- Finally, add 24:
\[ 48 + 24 = 72 \]

So, the sum of the numbers is 72.

### Step 3: Count the number of observations
We have a total of 4 numbers (observations):
- 12
- 16
- 20
- 24

### Step 4: Divide the sum by the number of observations
Now, we will divide the sum by the number of observations to find the mean:
\[ \text{Mean} = \frac{\text{Sum of observations}}{\text{Number of observations}} \]
\[ \text{Mean} = \frac{72}{4} \]

Calculating this gives:
\[ \text{Mean} = 18 \]

### Conclusion
Therefore, the mean of the numbers 12, 16, 20, and 24 is **18**.

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