Question

a man spends on an average of Rs.1950 for the first 7 months and Rs.1725 for the next 5 months find this monthly salary if he saves Rs.7797 during the whole year.

Answer 1

Solution:
Total expenditure for the first 3 months = 3 X 1600 
                                                           = 4800
Total expenditure for 4 months = 4 X 1550 
                                               = 6200
Total expenditure for 5 months = 5 X 1800 
                                               = 9000
Total expenditure and saving (which is income for one year)
= 4800 + 6200 + 9000 + 5200 = Rs. 25200
So, Average monthly income  = 25200/12 
                                             = Rs. 2100