A sports shop had 350 ping pong balls for sale. Each ping pong ball is sold at $2. 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 3 ping pong balls at $3 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
= 350 - 39 - 60 - 45 - 45
= 161
Fraction of ping pong balls left at the end of Day 4
=
161350=
2350 (b)
Number of ping pong balls sold from Day 5 to Day 6
= 33 + 48
= 81
Amount that it would collect if it sold the 81 ping pong balls at the original price
= 81 x 2
= $162
Number of sets of 3 ping pong balls
= 81 ÷ 3
= 27
Amount that it would collect if it sold the 81 ping pong balls at every 3 ping pong balls at $3
= 27 x 3
= $81
Amount that it would collect less from the sale of the ping pong balls
= 162 - 81
= $81
Answer(s): (a)
2350; (b) $81