PSLE A company offered 180 kettles at 10% 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 $9. 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 = 50
Number of kettles that were sold during the sale
= 180 - 50
= 130
Total amount that collected from the kettles sold
= 130 x 9
= $1170
Price of each kettle after 10% discount
= 100% - 10%
= 90%
90% of the price = 9
1% of the price = 9 ÷ 90 = 0.1
100% of the price = 100 x 0.1 = 10
Amount collected from selling the remaining kettles
= 50 x 10
= $500
Total amount collected from selling all the 180 kettles
= 1170 + 500
= $1670
Answer(s): (a) Day 3; (b) 50%; (c) $1670