Solution -
Profit percentage = [(goods left) / (goods sold)] × 100
= [(50) / (450)] × 100
= 100/9
= 11(1/9)%
Therefore,
His profit is 11(1/9)%.
Alternatively,
Let,
CP of 1 g = 1
CP of 450g = 450
A fruit seller declares that he sells fruits at the cost price.
SP of 1 g = 1
But,
He uses a weight of 450g instead of 500g.
So,
SP of 450 g = 500
Thus,
Profit = SP - CP
= 500 - 450
= 50
Profit % = (Profit / CP) × 100
= (50/450) × 100
= 100/9
= 11(1/9)%
Hence,
The correct answer is option (b) 11(1/9)%.
Thank You