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 gold and black markers sold?
- Each blue marker cost $0.10 more than each silver marker. The bookshop collected $57 from selling the silver markers. What was the price of 1 blue marker?
(a)
Difference between number of gold and black markers sold
= 90 - 34
= 56
(b)
Number of silver markers sold = 38
Price of 1 silver marker
= 57 ÷ 38
= $1.50
Price of 1 blue marker
= 1.50 + 0.10
= $1.60
Answer(s): (a) 56; (b) $1.60