PSLE A company offered $(dn0) speakers at 20% 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 $72. 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 = 36 Number of speakers that were sold for the first six days = 80 - 36 = 44 Percentage of speakers that were sold for the first six days = 4480 x 100% = 55%
(c)
Number of speakers that were left at the end of the sale = 24
Number of speakers that were sold during the sale
= 80 - 24
= 56
Total amount that collected from the speakers sold
= 56 x 72
= $4032
Price of each speaker 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 speakers
= 24 x 90
= $2160
Total amount collected from selling all the 80 speakers
= 4032 + 2160
= $6192
Answer(s): (a) Day 4; (b) 55%; (c) $6192