PSLE A company offered 180 kettles at 20% discount during a 7-day sale. The line graph shows the number of kettles left unsold at the end of each day.
- On which day was the most number of kettles sold? Give your answer in this format. (Eg Day 1)
- What percentage of the 180 kettles were sold in the first four days of the sale?
- During the sale, the discounted price of the kettles was $136. After the sale, the remaining kettles were sold without discount. What was the total amount of money collected from selling all 180 kettles?
(a)
The steepest line is from Day 2 to Day 3.
On Day 3, the most number of kettles was sold.
(b)
Number of kettles that were left at Day 4 = 90
Number of kettles that were sold for the first four days
= 180 - 90
= 90
Percentage of kettles that were sold for the first four days
=
90180 x 100%
= 50%
(c)
Number of kettles that were left at the end of the sale = 60
Number of kettles that were sold during the sale
= 180 - 60
= 120
Total amount that collected from the kettles sold
= 120 x 136
= $16320
Price of each kettle after 20% discount
= 100% - 20%
= 80%
80% of the price = 136
1% of the price = 136 ÷ 80 = 1.7
100% of the price = 100 x 1.7 = 170
Amount collected from selling the remaining kettles
= 60 x 170
= $10200
Total amount collected from selling all the 180 kettles
= 16320 + 10200
= $26520
Answer(s): (a) Day 3; (b) 50%; (c) $26520