A sports shop had 450 ping pong balls for sale. Each ping pong ball is sold at $5. At the end of each day, the number of ping pong balls sold was recorded in the bar graph shown.
- What fraction of the total number of ping pong balls was left at the end of Day 4? Express your answer in its simplest form.
- If the shop decided to sell every 6 ping pong balls at $25 from Day 5 onwards, how much less would it collect from the sale of the ping pong balls?
(a)
Number of ping pong balls left at the end of Day 4
= 450 - 120 - 108 - 60 - 102
= 60
Fraction of ping pong balls left at the end of Day 4
=
60450=
215 (b)
Number of ping pong balls sold from Day 5 to Day 6
= 96 + 84
= 180
Amount that it would collect if it sold the 180 ping pong balls at the original price
= 180 x 5
= $900
Number of sets of 6 ping pong balls
= 180 ÷ 6
= 30
Amount that it would collect if it sold the 180 ping pong balls at every 6 ping pong balls at $25
= 30 x 25
= $750
Amount that it would collect less from the sale of the ping pong balls
= 900 - 750
= $150
Answer(s): (a)
215; (b) $150