IBPS SO Prelims Exam Model Paper 9

Given:
Average expenditure from January to April = Rs. 15,000
Average expenditure from May to December = Rs. 30,000
Saving = Rs. 20,000
Formula used:
Average = sum of all observation/total number of observation
Calculation:
Expenditure from January to April = Rs. 60,000
Expenditure from May to December = Rs. 2,40,000
⇒ Total income of a year = Rs. 60,000 + Rs. 2,40,000 + Rs. 20,000
= Rs. 3,20,000
∴ Monthly average income =

3,20,000

12

= Rs. 26,666