PSLE A company offered 100 kettles at 30% 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 100 kettles were sold in the first four days of the sale?
- During the sale, the discounted price of the kettles was $42. After the sale, the remaining kettles were sold without discount. What was the total amount of money collected from selling all 100 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 = 40
Number of kettles that were sold for the first four days
= 100 - 40
= 60
Percentage of kettles that were sold for the first four days
=
60100 x 100%
= 60%
(c)
Number of kettles that were left at the end of the sale = 10
Number of kettles that were sold during the sale
= 100 - 10
= 90
Total amount that collected from the kettles sold
= 90 x 42
= $3780
Price of each kettle after 30% discount
= 100% - 30%
= 70%
70% of the price = 42
1% of the price = 42 ÷ 70 = 0.6
100% of the price = 100 x 0.6 = 60
Amount collected from selling the remaining kettles
= 10 x 60
= $600
Total amount collected from selling all the 100 kettles
= 3780 + 600
= $4380
Answer(s): (a) Day 3; (b) 60%; (c) $4380