A trader sold $\dfrac{2}{3}$ of his goods at a profit of $15\%$ and the rest at a profit of $9\%$. His…
A trader sold $\dfrac{2}{3}$ of his goods at a profit of $15\%$ and the rest at a profit of $9\%$. His overall profit percent (computed on total CP) is
$11\%$
$12\%$
$13\%$
$14\%$
Solution
Weighted profit\% $= \dfrac{2}{3}(15) + \dfrac{1}{3}(9) = 10 + 3 = 13\%$ on total CP.