A sports shop had 500 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 6 ping pong balls at $8 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
= 500 - 114 - 120 - 72
= 194
Fraction of ping pong balls left at the end of Day 3
=
194500=
97250 (b)
Number of ping pong balls sold from Day 4 to Day 6
= 78 + 102 + 72
= 252
Amount that it would collect if it sold the 252 ping pong balls at the original price
= 252 x 2
= $504
Number of sets of 6 ping pong balls
= 252 ÷ 6
= 42
Amount that it would collect if it sold the 252 ping pong balls at every 6 ping pong balls at $8
= 42 x 8
= $336
Amount that it would collect less from the sale of the ping pong balls
= 504 - 336
= $168
Answer(s): (a)
97250; (b) $168