Question

What is the average annual sales during the given period?

• A. 60 lakh
• B. 63 lakh
• C. 65 lakh
• D. 70 lakh

Hint:

To add the numbers quickly, group them:
$(40 + 60) + (50 + 90) + 75 = 100 + 140 + 75 = 240 + 75 = 315$.
Dividing 315 by 5 can be easily done by multiplying 315 by 2 and moving the decimal place:
$315 \times 2 = 630$, so $315 \div 5 = 63$.

Answer 1

The Correct Option is B

Step 1: List the yearly sales.
Reading the graph, the five values are $40$, $50$, $60$, $75$, and $90$ lakh for the years $2021$ to $2025$.

Step 2: Recall the average formula.
\[ \text{Average} = \frac{\text{sum of all years}}{\text{number of years}} \]

Step 3: Add the values in easy pairs.
$40 + 90 = 130$, and $50 + 75 = 125$, so far $255$, then add $60$ to get $315$.

Step 4: Count the years.
There are $5$ years in total.

Step 5: Divide the sum by 5.
$\frac{315}{5} = 63$.

Step 6: State the answer.
The average annual sales is $63$ lakh. \[ \boxed{63 \text{ lakh}} \]