Question

Sarita bought eggs at $R8.40$ a dozen. At what price per hundred must she sell them so as to earn a profit of $15\%$ ?

Answer 1

Cost per egg = $\frac{8.4}{12}=0.7$

Cost per hundred egg $=Rs70$

Let selecting price per hundred be $Rs.y$

$\Rightarrow \frac{y-70}{70}\times 100=15$

$\Rightarrow 10y-700=105$

$\Rightarrow y=80.5Rs$