PSLEA shop sold three brands of notebooks: Brand C, Brand D, and Brand E. The bar graph shows the number of notebooks sold for each brand in one day.
- How many notebooks were sold altogether?
- The shop collected $872 from selling the notebooks. The prices of Brand C, Brand D, and Brand E notebooks were in the ratio 1 : 4 : 2. How much money was collected from selling Brand D notebooks?
(a)
Number of Brand C notebooks sold = 30
Number of Brand D notebooks sold = 36
Number of Brand E notebooks sold = 22
Total number of notebooks sold
= 30 + 36 + 22
= 88
(b)
|
Brand C |
Brand D |
Brand E |
Number |
30 |
36 |
22 |
Price |
1 u |
4 u |
2 u |
Total value |
30 u |
144 u |
44 u |
Total amount of money collected
= 30 u + 144 u + 44 u
= 218 u
218 u = 872
1 u = 872 ÷ 218 = 4
Amount collected from selling Brand D notebooks
= 144 u
= 144 x 4
= $576
Answer(s): (a) 88; (b) $576