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 blue and green envelopes sold?
- Each white envelope cost $0.70 more than each red envelope. The bookshop collected $81 from selling the red envelopes. What was the price of 1 white envelope?
(a)
Difference between number of blue and green envelopes sold
= 50 - 44
= 6
(b)
Number of red envelopes sold = 30
Price of 1 red envelope
= 81 ÷ 30
= $2.70
Price of 1 white envelope
= 2.70 + 0.70
= $3.40
Answer(s): (a) 6; (b) $3.40