Final answer:
Zina received 95p in change after buying three packets of sweets with a £2 coin. This means the total cost for three packets was £1.05 (£2 - 95p). Thus, one packet of sweets cost 35p.
Step-by-step explanation:
Zina bought three packets of sweets, paid with a £2 coin, and received change consisting of 20p, 20p, 10p, 10p, 10p, 10p, 10p, 5p. To find the cost of one packet of sweets, first, we need to calculate the total change she received. Adding up the change:
- 20p + 20p = 40p
- 10p + 10p + 10p + 10p + 10p = 50p
- 40p + 50p + 5p = 95p in total change
Since Zina paid with a £2 coin, the total cost for three packets of sweets is the amount paid (£2) minus the change received (95p). That would be £2.00 - 0.95 = £1.05.
The cost of one packet of sweets is then £1.05 divided by 3, which equals 35p per packet.