What will be the Average Monthly Income?If

The average monthly expenditure of a family for the first four months is ₹ 2570, for the next three months ₹ 2490 and for the last five months ₹ 3030. If the family saves ₹ 5320 during the whole year, the average monthly income of the family during the year is

  1. ₹ 3000
  2. ₹ 3185
  3. ₹ 3200
  4. ₹ 3580
Manish Listener Asked on 15th July 2015 in Maths.
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  • 1 Answer(s)

    Answer: (2). Rs. 3185

    Let the salary of first for months be. X
    Average expenditure first four months of family is Rs. 2570
    Therefore, total salary of four months = Y = 2570 *4 = Rs.10280

    let the salary of next three months be Y
    Average Expenditue for next three months of family is Rs. 2490
    Therefore, total salary of next three months = Y =2490 * 3 = Rs. 7470

    Let the salary of last five months be. Z
    Average expenditure for last five months of family is Rs. 3030
    Therefore, total salary of last five months = z = 3030 *5 = Rs. 15150

    And the saving of family in whole year is Rs. 5320
    The salary of 12 months of family with their saving = Rs. ( 10280 + 7470 + 15150 +5320 ) = Rs. 38220.

    The Average monthly income of family = total salary of 12 months with savings / 12
    The Average monthly income of family = Rs. 3185.

    vijay Professor Answered on 15th July 2015.
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