A sports shop had 400 ping pong balls for sale. Each ping pong ball is sold at $3. 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 $16 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
= 400 - 78 - 84 - 96 - 96
= 46
Fraction of ping pong balls left at the end of Day 4
=
46400=
23200 (b)
Number of ping pong balls sold from Day 5 to Day 6
= 66 + 96
= 162
Amount that it would collect if it sold the 162 ping pong balls at the original price
= 162 x 3
= $486
Number of sets of 6 ping pong balls
= 162 ÷ 6
= 27
Amount that it would collect if it sold the 162 ping pong balls at every 6 ping pong balls at $16
= 27 x 16
= $432
Amount that it would collect less from the sale of the ping pong balls
= 486 - 432
= $54
Answer(s): (a)
23200; (b) $54