A sports shop had 500 tennis balls for sale. Each tennis ball is sold at $3. At the end of each day, the number of tennis balls sold was recorded in the bar graph shown.
- What fraction of the total number of tennis balls was left at the end of Day 4? Express your answer in its simplest form.
- If the shop decided to sell every 5 tennis balls at $12 from Day 5 onwards, how much less would it collect from the sale of the tennis balls?
(a)
Number of tennis balls left at the end of Day 4
= 500 - 85 - 100 - 65 - 75
= 175
Fraction of tennis balls left at the end of Day 4
=
175500=
720 (b)
Number of tennis balls sold from Day 5 to Day 6
= 80 + 50
= 130
Amount that it would collect if it sold the 130 tennis balls at the original price
= 130 x 3
= $390
Number of sets of 5 tennis balls
= 130 ÷ 5
= 26
Amount that it would collect if it sold the 130 tennis balls at every 5 tennis balls at $12
= 26 x 12
= $312
Amount that it would collect less from the sale of the tennis balls
= 390 - 312
= $78
Answer(s): (a)
720; (b) $78