The bookshop sells 4 different coloured pens. The line graph shows the number of pens sold for each colour in a week.
- What was the difference between the number of red and yellow pens sold?
- Each gold pen cost $0.40 more than each black pen. The bookshop collected $63 from selling the black pens. What was the price of 1 gold pen?
(a)
Difference between number of red and yellow pens sold
= 67 - 27
= 40
(b)
Number of black pens sold = 45
Price of 1 black pen
= 63 ÷ 45
= $1.40
Price of 1 gold pen
= 1.40 + 0.40
= $1.80
Answer(s): (a) 40; (b) $1.80