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 purple and black envelopes sold?
- Each grey envelope cost $0.80 more than each gold envelope. The bookshop collected $51 from selling the gold envelopes. What was the price of 1 grey envelope?
(a)
Difference between number of purple and black envelopes sold
= 74 - 33
= 41
(b)
Number of gold envelopes sold = 30
Price of 1 gold envelope
= 51 ÷ 30
= $1.70
Price of 1 grey envelope
= 1.70 + 0.80
= $2.50
Answer(s): (a) 41; (b) $2.50