A sports shop had 450 tennis balls for sale. Each tennis ball is sold at $5. 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 3 tennis balls at $13 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
= 450 - 48 - 33 - 33 - 60
= 276
Fraction of tennis balls left at the end of Day 4
=
276450=
4675 (b)
Number of tennis balls sold from Day 5 to Day 6
= 54 + 36
= 90
Amount that it would collect if it sold the 90 tennis balls at the original price
= 90 x 5
= $450
Number of sets of 3 tennis balls
= 90 ÷ 3
= 30
Amount that it would collect if it sold the 90 tennis balls at every 3 tennis balls at $13
= 30 x 13
= $390
Amount that it would collect less from the sale of the tennis balls
= 450 - 390
= $60
Answer(s): (a)
4675; (b) $60