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 gold and silver envelopes sold?
- Each grey envelope cost $0.20 more than each red envelope. The bookshop collected $99 from selling the red envelopes. What was the price of 1 grey envelope?
(a)
Difference between number of gold and silver envelopes sold
= 86 - 76
= 10
(b)
Number of red envelopes sold = 66
Price of 1 red envelope
= 99 ÷ 66
= $1.50
Price of 1 grey envelope
= 1.50 + 0.20
= $1.70
Answer(s): (a) 10; (b) $1.70