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 white and blue pens sold?
- Each silver pen cost $0.20 more than each red pen. The bookshop collected $87 from selling the red pens. What was the price of 1 silver pen?
(a)
Difference between number of white and blue pens sold
= 75 - 35
= 40
(b)
Number of red pens sold = 30
Price of 1 red pen
= 87 ÷ 30
= $2.90
Price of 1 silver pen
= 2.90 + 0.20
= $3.10
Answer(s): (a) 40; (b) $3.10