The expenses on rice, petrol and oil of a family are in the ratio 8 : 11 : 6. If the prices of these items are increased by 10%, 20%, and 30%, respectively, then the total expenses of the family on these items are increased by:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 19.2%.
The ratio of expenses on rice, petrol and oil of a family = 8 : 11 : 6
The prices of these items are increased by 10%, 20%, and 30%
By using the weighted average method:
The total expenditure of the family increased =
= 480/25 = 19.2%