A sports shop had 500 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 3? Express your answer in its simplest form.
- If the shop decided to sell every 3 tennis balls at $4 from Day 4 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 3
= 500 - 48 - 33 - 30
= 389
Fraction of tennis balls left at the end of Day 3
=
389500=
389500 (b)
Number of tennis balls sold from Day 4 to Day 6
= 51 + 30 + 60
= 141
Amount that it would collect if it sold the 141 tennis balls at the original price
= 141 x 2
= $282
Number of sets of 3 tennis balls
= 141 ÷ 3
= 47
Amount that it would collect if it sold the 141 tennis balls at every 3 tennis balls at $4
= 47 x 4
= $188
Amount that it would collect less from the sale of the tennis balls
= 282 - 188
= $94
Answer(s): (a)
389500; (b) $94