The average of the height of 5 students having height 30,40,50,60, 70 is

Options

A. 40
B. 50
C. 55
D. 45

Answer

To find the average height of the 5 students with heights 30, 40, 50, 60, and 70, we will follow these steps:

### Step 1: Add the heights together
We need to find the sum of all the heights:
- Heights: 30, 40, 50, 60, 70

Calculating the sum:
\[ 30 + 40 + 50 + 60 + 70 \]

### Step 2: Perform the addition
Let's add the numbers step by step:
- First, add 30 and 40:
\[ 30 + 40 = 70 \]
- Next, add 50:
\[ 70 + 50 = 120 \]
- Then, add 60:
\[ 120 + 60 = 180 \]
- Finally, add 70:
\[ 180 + 70 = 250 \]

So, the total sum of the heights is 250.

### Step 3: Divide the sum by the number of students
Now, we will divide the total sum by the number of students, which is 5:
\[ \text{Average} = \frac{\text{Total Sum}}{\text{Number of Students}} = \frac{250}{5} \]

### Step 4: Perform the division
Now, we will calculate:
\[ \frac{250}{5} = 50 \]

### Conclusion
The average height of the 5 students is **50**.

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