The bookshop sells 4 different coloured envelopes. The line graph shows the number of envelopes sold for each colour in a week.
- What was the difference between the number of grey and white envelopes sold?
- Each gold envelope cost $0.10 more than each purple envelope. The bookshop collected $77 from selling the purple envelopes. What was the price of 1 gold envelope?
(a)
Difference between number of grey and white envelopes sold
= 61 - 14
= 47
(b)
Number of purple envelopes sold = 70
Price of 1 purple envelope
= 77 ÷ 70
= $1.10
Price of 1 gold envelope
= 1.10 + 0.10
= $1.20
Answer(s): (a) 47; (b) $1.20