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 4? Express your answer in its simplest form.
- If the shop decided to sell every 3 ping pong balls at $1 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
= 500 - 54 - 57 - 30 - 33
= 326
Fraction of ping pong balls left at the end of Day 4
=
326500=
163250 (b)
Number of ping pong balls sold from Day 5 to Day 6
= 36 + 57
= 93
Amount that it would collect if it sold the 93 ping pong balls at the original price
= 93 x 2
= $186
Number of sets of 3 ping pong balls
= 93 ÷ 3
= 31
Amount that it would collect if it sold the 93 ping pong balls at every 3 ping pong balls at $1
= 31 x 1
= $31
Amount that it would collect less from the sale of the ping pong balls
= 186 - 31
= $155
Answer(s): (a)
163250; (b) $155