At the office supply store, a box of 25 pens costs $7.19 a box of 50 pens costs $10.78, a box of 75 pens costs $14.53, a box of 100 100 pens costs $22.50 and a box of 125 box costs of $26.25. Which box has the cheapest per pen cost?
Answers
Question: At the office supply store, a box of 25 pens costs $7.19 a box of 50 pens costs $10.78, a box of 75 pens costs $14.53, a box of 100 100 pens costs $22.50 and a box of 125 box costs of $26.25. Which box has the cheapest per pen cost?
Solution: In order to solve the question let us number the boxes as B1, B2, B3, B4 and B5. These are the boxes with 25 pens, 50 pens, 75pens, 100 pens and 125 pens respectively.
The per pen cost for box B1 is: $(7.19/25) = $0.2876.
The per pen cost for box B2 is: $(10.78/50) = $0.2156.
The per pen cost for box B3 is: $(14.53/75) = $0.1937.
The per pen cost for box B4 is: $(22.5/100) = $0.225.
The per pen cost for box B5 is: $(26.25/125) = $0.21.
So, comparing all we can easily say that Box B3 has the cheapest per pen cost. i.e. $0.1937 [Ans]
Answer:125
Step-by-step explanation: