A sports shop had 450 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 4? Express your answer in its simplest form.
- If the shop decided to sell every 4 tennis balls at $17 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
= 450 - 72 - 72 - 72 - 44
= 190
Fraction of tennis balls left at the end of Day 4
=
190450=
1945 (b)
Number of tennis balls sold from Day 5 to Day 6
= 80 + 68
= 148
Amount that it would collect if it sold the 148 tennis balls at the original price
= 148 x 5
= $740
Number of sets of 4 tennis balls
= 148 ÷ 4
= 37
Amount that it would collect if it sold the 148 tennis balls at every 4 tennis balls at $17
= 37 x 17
= $629
Amount that it would collect less from the sale of the tennis balls
= 740 - 629
= $111
Answer(s): (a)
1945; (b) $111