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 black and gold envelopes sold?
- Each grey envelope cost $0.70 more than each yellow envelope. The bookshop collected $77 from selling the yellow envelopes. What was the price of 1 grey envelope?
(a)
Difference between number of black and gold envelopes sold
= 29 - 22
= 7
(b)
Number of yellow envelopes sold = 35
Price of 1 yellow envelope
= 77 ÷ 35
= $2.20
Price of 1 grey envelope
= 2.20 + 0.70
= $2.90
Answer(s): (a) 7; (b) $2.90