which of these special buying opportunities is the best deal?

Question

A)Buy 1, get the next at half price B) Buy 5, get the next 3 free C) Buy 2, get the next 1 free OR D) Buy 3, get the next 2 free

Answer 1

Easiest to answer by calculating the average price of each

Let's say that the initial cost is $100

 

A. Buy 1, get the next at half price - $100 for first, next one for $50 - average price = $150/2 = $75

B. Buy 5, get the next 3 free - $100 each for 5 plus 3 free = $100*5 = $500 ,but we get 3 free = $500/8 = $62.5

C. Buy 2, get the next 1 free - $100 each for 2, then one free  = $100*2, but we get one free = $200/3 = $66.67

D. Buy 3, get the next 2 free - $100 each for 3, then two free = $100*3, bu we get three free = $300/5 = $60

 

Choose option with lowest average price, which is option D.

 

Does that make sense? Do you see how I did this?