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 $14 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 - 80 - 44 - 68
= 308
Fraction of tennis balls left at the end of Day 3
=
308500=
77125 (b)
Number of tennis balls sold from Day 4 to Day 6
= 72 + 76 + 52
= 200
Amount that it would collect if it sold the 200 tennis balls at the original price
= 200 x 4
= $800
Number of sets of 4 tennis balls
= 200 ÷ 4
= 50
Amount that it would collect if it sold the 200 tennis balls at every 4 tennis balls at $14
= 50 x 14
= $700
Amount that it would collect less from the sale of the tennis balls
= 800 - 700
= $100
Answer(s): (a)
77125; (b) $100