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 brown and purple pens sold?
- Each grey pen cost $0.50 more than each blue pen. The bookshop collected $69 from selling the blue pens. What was the price of 1 grey pen?
(a)
Difference between number of brown and purple pens sold
= 72 - 23
= 49
(b)
Number of blue pens sold = 15
Price of 1 blue pen
= 69 ÷ 15
= $4.60
Price of 1 grey pen
= 4.60 + 0.50
= $5.10
Answer(s): (a) 49; (b) $5.10