The bookshop sells 4 different coloured papers. The line graph shows the number of papers sold for each colour in a week.
- What was the difference between the number of yellow and red papers sold?
- Each black paper cost $0.60 more than each purple paper. The bookshop collected $77 from selling the purple papers. What was the price of 1 black paper?
(a)
Difference between number of yellow and red papers sold
= 65 - 43
= 22
(b)
Number of purple papers sold = 22
Price of 1 purple paper
= 77 ÷ 22
= $3.50
Price of 1 black paper
= 3.50 + 0.60
= $4.10
Answer(s): (a) 22; (b) $4.10