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 green and brown markers sold?
- Each blue marker cost $0.20 more than each silver marker. The bookshop collected $78 from selling the silver markers. What was the price of 1 blue marker?
(a)
Difference between number of green and brown markers sold
= 55 - 16
= 39
(b)
Number of silver markers sold = 20
Price of 1 silver marker
= 78 ÷ 20
= $3.90
Price of 1 blue marker
= 3.90 + 0.20
= $4.10
Answer(s): (a) 39; (b) $4.10