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 3? Express your answer in its simplest form.
- If the shop decided to sell every 4 ping pong balls at $3 from Day 4 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 3
= 350 - 76 - 80 - 72
= 122
Fraction of ping pong balls left at the end of Day 3
=
122350=
61175 (b)
Number of ping pong balls sold from Day 4 to Day 6
= 60 + 60 + 68
= 188
Amount that it would collect if it sold the 188 ping pong balls at the original price
= 188 x 2
= $376
Number of sets of 4 ping pong balls
= 188 ÷ 4
= 47
Amount that it would collect if it sold the 188 ping pong balls at every 4 ping pong balls at $3
= 47 x 3
= $141
Amount that it would collect less from the sale of the ping pong balls
= 376 - 141
= $235
Answer(s): (a)
61175; (b) $235