Question

The average expenditure of a man for the first five months of a year is Rs.5000 and for the next seven months is Rs.5400.He saves Rs. 2300 during the year. Find his average monthly income.

Answer 1

Answer :
   Total Expenditure = Average Expenditure * Number of months

According to Question,
   Average Expenditure for first five months = 5000
therefore,
Total expenditure for first five months =5*5000 =25000

Average expenditure for next seven months = 5400
therefore,
 Total expenditure for next seven months = 7*5400 =37800

Also , saving of a man in a year =2300

Therefore ,
   Total Earnings of a man in a year = 25000+37800+2300
                                                        =65100
    Therefore , 
 Average monthly income = total earnings in a year /number of months in a year
                                        =65100/12
                                        =5425

hence Monthly income of a man is 5425.

Hope this helps you.

Thank You.
Regards,
Tawseef