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 silver and white markers sold?
- Each black marker cost $0.30 more than each green marker. The bookshop collected $87 from selling the green markers. What was the price of 1 black marker?
(a)
Difference between number of silver and white markers sold
= 15 - 12
= 3
(b)
Number of green markers sold = 15
Price of 1 green marker
= 87 ÷ 15
= $5.80
Price of 1 black marker
= 5.80 + 0.30
= $6.10
Answer(s): (a) 3; (b) $6.10