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 yellow and silver pens sold?
- Each grey pen cost $0.50 more than each white pen. The bookshop collected $74 from selling the white pens. What was the price of 1 grey pen?
(a)
Difference between number of yellow and silver pens sold
= 77 - 59
= 18
(b)
Number of white pens sold = 10
Price of 1 white pen
= 74 ÷ 10
= $7.40
Price of 1 grey pen
= 7.40 + 0.50
= $7.90
Answer(s): (a) 18; (b) $7.90