A sports shop had 450 tennis balls for sale. Each tennis ball is sold at $2. 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 6 tennis balls at $8 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 - 120 - 72 - 72 - 120
= 66
Fraction of tennis balls left at the end of Day 4
=
66450=
1175 (b)
Number of tennis balls sold from Day 5 to Day 6
= 60 + 78
= 138
Amount that it would collect if it sold the 138 tennis balls at the original price
= 138 x 2
= $276
Number of sets of 6 tennis balls
= 138 ÷ 6
= 23
Amount that it would collect if it sold the 138 tennis balls at every 6 tennis balls at $8
= 23 x 8
= $184
Amount that it would collect less from the sale of the tennis balls
= 276 - 184
= $92
Answer(s): (a)
1175; (b) $92