A sports shop had 350 tennis balls for sale. Each tennis ball is sold at $4. 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 $9 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
= 350 - 42 - 48 - 51 - 60
= 149
Fraction of tennis balls left at the end of Day 4
=
149350=
149350 (b)
Number of tennis balls sold from Day 5 to Day 6
= 30 + 57
= 87
Amount that it would collect if it sold the 87 tennis balls at the original price
= 87 x 4
= $348
Number of sets of 3 tennis balls
= 87 ÷ 3
= 29
Amount that it would collect if it sold the 87 tennis balls at every 3 tennis balls at $9
= 29 x 9
= $261
Amount that it would collect less from the sale of the tennis balls
= 348 - 261
= $87
Answer(s): (a)
149350; (b) $87