Question

You pick out 2 video games for $12.99 each, 3 games for $9.49 each, and a game for $15.97. At the register you can find out that, when you buy 5 video games, you get the sixth game half off. Find the total cost if you get the least expensive game half off.

Answer 1

Well, you're buying 6 games in total:

• 3 "cheap" games (9.49)
• 2 "medium" games (12.99)
• 1 "expensive" game (15.97)

Given the promotion, you know that you can pay 5 games full price, and the 6th will be half off. This will be one of the cheap one, so you'll pay

• 1 cheap game half off (9.49/2 = 4.745)
• 2 "cheap" games full price (9.49)
• 2 "medium" games full price (12.99)
• 1 "expensive" game full price (15.97)

So, the total is

`4.745 + 2\cdot 9.49 + 2 \cdot 12.99 + 15.97 = 65.675`

which can be rounded to 65.68