A sports shop had 500 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 3 tennis balls at $11 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
= 500 - 36 - 60 - 48 - 48
= 308
Fraction of tennis balls left at the end of Day 4
=
308500=
77125 (b)
Number of tennis balls sold from Day 5 to Day 6
= 48 + 51
= 99
Amount that it would collect if it sold the 99 tennis balls at the original price
= 99 x 5
= $495
Number of sets of 3 tennis balls
= 99 ÷ 3
= 33
Amount that it would collect if it sold the 99 tennis balls at every 3 tennis balls at $11
= 33 x 11
= $363
Amount that it would collect less from the sale of the tennis balls
= 495 - 363
= $132
Answer(s): (a)
77125; (b) $132