PSLE A company offered 200 kettles at 40% 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 200 kettles were sold in the first four days of the sale?
- During the sale, the discounted price of the kettles was $90. After the sale, the remaining kettles were sold without discount. What was the total amount of money collected from selling all 200 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 = 100
Number of kettles that were sold for the first four days
= 200 - 100
= 100
Percentage of kettles that were sold for the first four days
=
100200 x 100%
= 50%
(c)
Number of kettles that were left at the end of the sale = 50
Number of kettles that were sold during the sale
= 200 - 50
= 150
Total amount that collected from the kettles sold
= 150 x 90
= $13500
Price of each kettle after 40% discount
= 100% - 40%
= 60%
60% of the price = 90
1% of the price = 90 ÷ 60 = 1.5
100% of the price = 100 x 1.5 = 150
Amount collected from selling the remaining kettles
= 50 x 150
= $7500
Total amount collected from selling all the 200 kettles
= 13500 + 7500
= $21000
Answer(s): (a) Day 3; (b) 50%; (c) $21000