The pocket-expenses of Rahul during a week are Rs 15.40, Rs18.00, Rs16.50,Rs 14.75, Rs12.60 and Rs17.25 Find his mean pocket-expenses per day

Options

A. 11.78
B. 13.42
C. 15.75
D. 12.33

Answer

To find Rahul's mean pocket-expenses per day, we will follow these steps:

### Step 1: List the pocket-expenses
Rahul's pocket-expenses during the week are:
- Rs 15.40
- Rs 18.00
- Rs 16.50
- Rs 14.75
- Rs 12.60
- Rs 17.25

### Step 2: Calculate the sum of the expenses
Now, we will add all these expenses together:
\[ \text{Total Expenses} = 15.40 + 18.00 + 16.50 + 14.75 + 12.60 + 17.25 \]

Calculating this step-by-step:
- \( 15.40 + 18.00 = 33.40 \)
- \( 33.40 + 16.50 = 49.90 \)
- \( 49.90 + 14.75 = 64.65 \)
- \( 64.65 + 12.60 = 77.25 \)
- \( 77.25 + 17.25 = 94.50 \)

So, the total expenses are Rs 94.50.

### Step 3: Count the number of observations
The number of days (observations) for which we have the expenses is 6.

### Step 4: Calculate the mean
To find the mean, we divide the total expenses by the number of observations:
\[ \text{Mean} = \frac{\text{Total Expenses}}{\text{Number of Observations}} = \frac{94.50}{6} \]

Calculating this gives:
\[ \text{Mean} = 15.75 \]

### Final Answer
Rahul's mean pocket-expenses per day is Rs 15.75.

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