PSLE A company offered $(dn0) lamps at 40% discount during a 7-day sale. The line graph shows the number of lamps left unsold at the end of each day.
- On which day was the most number of lamps sold? Give your answer in this format. (Eg Day 1)
- What percentage of the 60 lamps were sold in the first six days of the sale?
- During the sale, the discounted price of the lamps was $6. After the sale, the remaining lamps were sold without discount. What was the total amount of money collected from selling all 60 lamps?
(a)
Steepest line is from Day 3 to Day 4.
On Da
y 4, the most number of lamps was sold. (b) Number of lamps that were left at Day 6 = 12 Number of lamps that were sold for the first six days = 60 - 12 = 48 Percentage of lamps that were sold for the first six days = 4860 x 100% = 80%
(c)
Number of lamps that were left at the end of the sale = 4
Number of lamps that were sold during the sale
= 60 - 4
= 56
Total amount that collected from the lamps sold
= 56 x 6
= $336
Price of each lamp after 40% discount
= 100% - 40%
= 60%
60% of the price = 6
1% of the price = 6 ÷ 60 = 0.1
100% of the price = 100 x 0.1 = 10
Amount collected from selling the remaining lamps
= 4 x 10
= $40
Total amount collected from selling all the 60 lamps
= 336 + 40
= $376
Answer(s): (a) Day 4; (b) 80%; (c) $376