Kavita obtained 16, 14, 18 and 20 marks (out of 25) in Maths in weekly tests in the month of Jan 2000, then mean marks of Kavita is

Options

A. 16
B. 16.5
C. 17
D. 17.5

Answer

To find the mean marks of Kavita, we will follow these steps:

### Step 1: List the marks obtained by Kavita
Kavita obtained the following marks in her weekly tests:
- 16
- 14
- 18
- 20

### Step 2: Calculate the sum of the marks
Now, we need to add these marks together:
\[ \text{Sum} = 16 + 14 + 18 + 20 \]

Calculating the sum:
\[ 16 + 14 = 30 \]
\[ 30 + 18 = 48 \]
\[ 48 + 20 = 68 \]
So, the total sum of the marks is 68.

### Step 3: Count the total number of observations
Next, we need to determine the total number of tests (observations) Kavita took. She took 4 tests:
- 1st test
- 2nd test
- 3rd test
- 4th test

Thus, the total number of observations is 4.

### Step 4: Calculate the mean
To find the mean, we will use the formula:
\[ \text{Mean} = \frac{\text{Sum of observations}}{\text{Total number of observations}} \]
Substituting the values we calculated:
\[ \text{Mean} = \frac{68}{4} \]

Calculating the mean:
\[ 68 \div 4 = 17 \]

### Conclusion
The mean marks of Kavita is 17.

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