A sports shop had 500 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 3? Express your answer in its simplest form.
- If the shop decided to sell every 4 tennis balls at $12 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 - 64 - 72
= 316
Fraction of tennis balls left at the end of Day 3
=
316500=
79125 (b)
Number of tennis balls sold from Day 4 to Day 6
= 52 + 68 + 68
= 188
Amount that it would collect if it sold the 188 tennis balls at the original price
= 188 x 4
= $752
Number of sets of 4 tennis balls
= 188 ÷ 4
= 47
Amount that it would collect if it sold the 188 tennis balls at every 4 tennis balls at $12
= 47 x 12
= $564
Amount that it would collect less from the sale of the tennis balls
= 752 - 564
= $188
Answer(s): (a)
79125; (b) $188