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1. A man buys eggs at the rate of Tk.7.2 per dazon eggs and sells them at Tk.70 per 100 eggs. If his profit is Tk.30, how many eggs did he buy?
- A. 120
- B. 120
- C. 120
- D. 120
Answer: Option D
Explanation:
Let the number of eggs he bought be D.
Buying price per egg = 7.2/12
Selling price per egg = 70/100
So, 70D/100 - 7.2D/12 = 30
or, 7D/10 - 7.2D/12 = 30
or, (42D - 36D) / 60 = 30
or, 6D = 60 x 30
or, D = 1800 / 6 = 300.
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