The bookshop sells 4 different coloured markers. The line graph shows the number of markers sold for each colour in a week.
- What was the difference between the number of red and green markers sold?
- Each black marker cost $0.30 more than each purple marker. The bookshop collected $81 from selling the purple markers. What was the price of 1 black marker?
(a)
Difference between number of red and green markers sold
= 81 - 46
= 35
(b)
Number of purple markers sold = 18
Price of 1 purple marker
= 81 ÷ 18
= $4.50
Price of 1 black marker
= 4.50 + 0.30
= $4.80
Answer(s): (a) 35; (b) $4.80