A sports shop had 450 tennis balls for sale. Each tennis ball is sold at $3. 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
= 450 - 48 - 45 - 51
= 306
Fraction of tennis balls left at the end of Day 3
=
306450=
1725 (b)
Number of tennis balls sold from Day 4 to Day 6
= 30 + 51 + 42
= 123
Amount that it would collect if it sold the 123 tennis balls at the original price
= 123 x 3
= $369
Number of sets of 3 tennis balls
= 123 ÷ 3
= 41
Amount that it would collect if it sold the 123 tennis balls at every 3 tennis balls at $4
= 41 x 4
= $164
Amount that it would collect less from the sale of the tennis balls
= 369 - 164
= $205
Answer(s): (a)
1725; (b) $205