PSLE A company offered $(dn0) speakers at 10% 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 100 speakers were sold in the first six days of the sale?
- During the sale, the discounted price of the speakers was $36. After the sale, the remaining speakers were sold without discount. What was the total amount of money collected from selling all 100 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 = 25 Number of speakers that were sold for the first six days = 100 - 25 = 75 Percentage of speakers that were sold for the first six days = 75100 x 100% = 75%
(c)
Number of speakers that were left at the end of the sale = 15
Number of speakers that were sold during the sale
= 100 - 15
= 85
Total amount that collected from the speakers sold
= 85 x 36
= $3060
Price of each speaker after 10% discount
= 100% - 10%
= 90%
90% of the price = 36
1% of the price = 36 ÷ 90 = 0.4
100% of the price = 100 x 0.4 = 40
Amount collected from selling the remaining speakers
= 15 x 40
= $600
Total amount collected from selling all the 100 speakers
= 3060 + 600
= $3660
Answer(s): (a) Day 4; (b) 75%; (c) $3660