The bookshop sells 4 different coloured pencils. The line graph shows the number of pencils sold for each colour in a week.
- What was the difference between the number of white and gold pencils sold?
- Each black pencil cost $0.10 more than each grey pencil. The bookshop collected $68 from selling the grey pencils. What was the price of 1 black pencil?
(a)
Difference between number of white and gold pencils sold
= 56 - 33
= 23
(b)
Number of grey pencils sold = 40
Price of 1 grey pencil
= 68 ÷ 40
= $1.70
Price of 1 black pencil
= 1.70 + 0.10
= $1.80
Answer(s): (a) 23; (b) $1.80