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 = 45
Number of kettles that were sold for the first four days
= 100 - 45
= 55
Percentage of kettles that were sold for the first four days
=
55100 x 100%
= 55%
(c)
Number of kettles that were left at the end of the sale = 15
Number of kettles that were sold during the sale
= 100 - 15
= 85
Total amount that collected from the kettles sold
= 85 x 42
= $3570
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
= 15 x 60
= $900
Total amount collected from selling all the 100 kettles
= 3570 + 900
= $4470
Answer(s): (a) Day 3; (b) 55%; (c) $4470