Question : The table given below shows the income and expenditure of a company in five years.
| years | Income | Expenditure |
| A | 350 | 150 |
| B | 250 | 100 |
| C | 200 | 150 |
| D | 400 | 100 |
| E | 150 | 75 |
Saving = Income – Expenditure
What is the average saving in all years?
Option 1: 245
Option 2: 145
Option 3: 175
Option 4: 155
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Correct Answer: 155
Solution :
For year A, the savings = 350 – 150 = 200
For year B, the savings = 250 – 100 = 150
For year C, the savings = 200 – 150 = 50
For year D, the savings = 400 – 100 = 300
For year E, the savings = 150 – 75 = 75
The total savings over the five years = 200 + 150 + 50 + 300 + 75 = 775
Therefore, the average savings over the five years = $\frac{775}{5}$ = 155
Hence, the correct answer is 155.
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