A sports shop had 350 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 3? Express your answer in its simplest form.
- If the shop decided to sell every 3 tennis balls at $10 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
= 350 - 39 - 30 - 30
= 251
Fraction of tennis balls left at the end of Day 3
=
251350=
251350 (b)
Number of tennis balls sold from Day 4 to Day 6
= 54 + 42 + 42
= 138
Amount that it would collect if it sold the 138 tennis balls at the original price
= 138 x 5
= $690
Number of sets of 3 tennis balls
= 138 ÷ 3
= 46
Amount that it would collect if it sold the 138 tennis balls at every 3 tennis balls at $10
= 46 x 10
= $460
Amount that it would collect less from the sale of the tennis balls
= 690 - 460
= $230
Answer(s): (a)
251350; (b) $230