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 white and black papers sold?
- Each grey paper cost $0.30 more than each red paper. The bookshop collected $51 from selling the red papers. What was the price of 1 grey paper?
(a)
Difference between number of white and black papers sold
= 24 - 12
= 12
(b)
Number of red papers sold = 85
Price of 1 red paper
= 51 ÷ 85
= $0.60
Price of 1 grey paper
= 0.60 + 0.30
= $0.90
Answer(s): (a) 12; (b) $0.90