Question

Priya bought eggs at 8.40 a dozen. At what price per hundred must she sell them so as to earn a profit of 15%?
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Answer 1

dozen eggs = 12 eggs

12 eggs = ₹8.40

cost of one egg:

$\frac{8.40}{12}$

= ₹0.7

hence cost of 100 eggs = 0.7×100 = ₹70

cp of 100 = ₹70

gain% = 15%

$sp = \frac{100 + 15}{100} \times 70$

$sp = \frac{115}{100} \times 70$

sp = ₹80.5