A man bought 50 dozen eggs of a rate of rs.4 per dozen. he finds 40 eggs rotten. in order to gains 5%, he should sell eggs at
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50 dozens of eggs = 50×12 = 600 eggs.
Cost of the eggs = ₹4/dozen × 50 dozens = ₹200
In order to gain 5% on the eggs, the seller must sell it at ₹200 + 5% of ₹200 = ₹210.
Eggs left after removing the rotten ones = 600 - 40 = 560 eggs.
Cost of each egg = ₹ 210/560 = ₹ 3/8.
Cost of one dozen eggs = ₹ 12×3/8 = ₹ 4.50
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