PSLE A company offered $(dn0) speakers at 40% discount during a 7-day sale. The line graph shows the number of speakers left unsold at the end of each day.
- On which day was the most number of speakers sold? Give your answer in this format. (Eg Day 1)
- What percentage of the 80 speakers were sold in the first six days of the sale?
- During the sale, the discounted price of the speakers was $42. After the sale, the remaining speakers were sold without discount. What was the total amount of money collected from selling all 80 speakers?
(a)
Steepest line is from Day 3 to Day 4.
On Da
y 4, the most number of speakers was sold. (b) Number of speakers that were left at Day 6 = 20 Number of speakers that were sold for the first six days = 80 - 20 = 60 Percentage of speakers that were sold for the first six days = 6080 x 100% = 75%
(c)
Number of speakers that were left at the end of the sale = 12
Number of speakers that were sold during the sale
= 80 - 12
= 68
Total amount that collected from the speakers sold
= 68 x 42
= $2856
Price of each speaker after 40% discount
= 100% - 40%
= 60%
60% of the price = 42
1% of the price = 42 ÷ 60 = 0.7
100% of the price = 100 x 0.7 = 70
Amount collected from selling the remaining speakers
= 12 x 70
= $840
Total amount collected from selling all the 80 speakers
= 2856 + 840
= $3696
Answer(s): (a) Day 4; (b) 75%; (c) $3696