PSLE A company offered 100 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 100 kettles were sold in the first five days of the sale?
- During the sale, the discounted price of the kettles was $72. 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 1 to Day 2.
On Day
2, the most number of kettles was sold.
(b)
Number of kettles that were left at Day
5 = 35 Number of kettles that were sold for the first five days = 100 - 35 = 65 Percentage of kettles that were sold for the first five days
=
65100 x 100%
= 65%
(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 72
= $6120
Price of each kettle after 20% discount
= 100% - 20%
= 80%
80% of the price = 72
1% of the price = 72 ÷ 80 = 0.9
100% of the price = 100 x 0.9 = 90
Amount collected from selling the remaining kettles
= 15 x 90
= $1350
Total amount collected from selling all the 100 kettles
= 6120 + 1350
= $7470
Answer(s): (a) Day
2; (b) 65%; (c) $7470