Soution - Total cost = Cost of fresh mangoes + Cost of packaging
Let,
The Cost of fresh mangoes = 100
The cost of packaging = 40% of cost of fresh mangoes
The cost of packaging = (40/100) × 100
= 40
Therefore,
Total cost = Cost of fresh mangoes + Cost of packaging
Total cost = 100 + 40
Total cost = 140
After, increasing the cost of fresh mangoes by 30%
New Cost of fresh mangoes = 100 + (30/100) × 100
New Cost of fresh mangoes = 100 + 30
New Cost of fresh mangoes = 130
After, decreasing the cost of packaging by 50 %
New Cost of packaging = 50% of 40
New Cost of packaging = 20
Now,
New Total cost = 130 + 20
New Total cost = 150
Change in cost = 150 - 140 = 10
Percentage change in cost = (change in cost / initial total cost) × 100
= (10/140) × 100
= 7.14%
Hence,
The correct option is (b) 7.14%
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