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 $6 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 - 80 - 44 - 60
= 166
Fraction of ping pong balls left at the end of Day 3
=
166350=
83175 (b)
Number of ping pong balls sold from Day 4 to Day 6
= 64 + 44 + 60
= 168
Amount that it would collect if it sold the 168 ping pong balls at the original price
= 168 x 2
= $336
Number of sets of 4 ping pong balls
= 168 ÷ 4
= 42
Amount that it would collect if it sold the 168 ping pong balls at every 4 ping pong balls at $6
= 42 x 6
= $252
Amount that it would collect less from the sale of the ping pong balls
= 336 - 252
= $84
Answer(s): (a)
83175; (b) $84