posted by Shani .
For $4.50 a grocer buys a case of fruit which contains 14 dozen. She knows that 4 dozen will spoil before she sells them. At what price per dozen must she sell the good ones to gain 1/3 of the whole cost?
is there any quick way to do this question.
(1/3) * $4.50 = $1.50. = Income.
P = $1.50 / (14-4) = $0.15 / doz.