c. The mean of first ten odd natural number is ……………….

Answer

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

### Step 1: Identify the first ten odd natural numbers.
The first ten odd natural numbers are:
1, 3, 5, 7, 9, 11, 13, 15, 17, 19.

### Step 2: Calculate the sum of these numbers.
Now, we will sum these numbers:
\[ 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 \]

Calculating the sum step by step:
- \(1 + 3 = 4\)
- \(4 + 5 = 9\)
- \(9 + 7 = 16\)
- \(16 + 9 = 25\)
- \(25 + 11 = 36\)
- \(36 + 13 = 49\)
- \(49 + 15 = 64\)
- \(64 + 17 = 81\)
- \(81 + 19 = 100\)

So, the total sum is \(100\).

### Step 3: Calculate the mean.
The mean is calculated by dividing the sum of the numbers by the total count of the numbers. Here, we have 10 numbers.

\[ \text{Mean} = \frac{\text{Sum of numbers}}{\text{Total count}} = \frac{100}{10} = 10 \]

### Final Answer:
The mean of the first ten odd natural numbers is **10**.

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