The average monthly expenditure of a family was ` 2750 for the first 3 months, ` 3150 for the next three months and ` 6750 for the next three months. Find the average income of the family for the 9 months, if they save ` 650 per month
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Answer:
Step-by-step explanation:
Total earnings = Savings + expenditure.
Savings for 3 months = 3 × '650 = '1950
This is because they save '650 monthly.
Total earnings for :
The first three months = '2750 × 3 + '1950 = '10200
The second three months = '3150 × 3 + '1950 = '11400
The last 3 months = '6750 × 3 + '1950 = '22200
Total earnings for the 9 months :
= '10200 + '11400 + '22200 = '43800
The average earnings for the 9 months is :
'43800/9 = '4866.67 per month.
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