Find the mean of 43, 51, 50, 57 and 54.

Answer

To find the mean of the numbers 43, 51, 50, 57, and 54, we can follow these steps:

### Step 1: Identify the observations
The observations given are:
- 43
- 51
- 50
- 57
- 54

### Step 2: Calculate the sum of the observations
We need to add all the observations together:
\[ 43 + 51 + 50 + 57 + 54 \]

Calculating this step-by-step:
1. \(43 + 51 = 94\)
2. \(94 + 50 = 144\)
3. \(144 + 57 = 201\)
4. \(201 + 54 = 255\)

So, the sum of the observations is \(255\).

### Step 3: Count the total number of observations
The total number of observations is:
- 1 (for 43)
- 1 (for 51)
- 1 (for 50)
- 1 (for 57)
- 1 (for 54)

Thus, the total number of observations is \(5\).

### Step 4: Calculate the mean
The mean is calculated by dividing the sum of the observations by the total number of observations:
\[ \text{Mean} = \frac{\text{Sum of observations}}{\text{Total number of observations}} = \frac{255}{5} \]

Calculating this gives:
\[ \text{Mean} = 51 \]

### Final Answer
The mean of the numbers 43, 51, 50, 57, and 54 is \(51\).

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