Find the mean of first 7 odd natural numbers.

Options

A. 49
B. 28
C. 21
D. 7

Answer

To find the mean of the first 7 odd natural numbers, we can follow these steps:

### Step 1: Identify the first 7 odd natural numbers
The first 7 odd natural numbers are:
1, 3, 5, 7, 9, 11, 13

### Step 2: Calculate the sum of these numbers
Now, we need to add these numbers together:
1 + 3 + 5 + 7 + 9 + 11 + 13

Calculating the sum step by step:
- 1 + 3 = 4
- 4 + 5 = 9
- 9 + 7 = 16
- 16 + 9 = 25
- 25 + 11 = 36
- 36 + 13 = 49

So, the total sum is 49.

### Step 3: Count the total number of elements
The total number of elements (odd natural numbers) we have is 7.

### Step 4: Calculate the mean
The mean is calculated by dividing the sum of the numbers by the total number of elements:
Mean = (Sum of elements) / (Total number of elements)
Mean = 49 / 7

Calculating this gives:
Mean = 7

### Final Answer
The mean of the first 7 odd natural numbers is **7**.

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