Question: Zina buys three packets of sweets.
She pays with a £2 coin and receives the following change.
What is the cost of one packet of sweets?
Answer: ___ pence
1. **State the problem:** Zina buys three packets of sweets and pays with a £2 coin (which is 200 pence).
2. **Calculate the total change received:** The change consists of coins: 2 x 2p, 5 x 10p, and 1 x 5p.
3. **Sum the change:**
$$2 \times 2p + 5 \times 10p + 1 \times 5p = 4p + 50p + 5p = 59p$$
4. **Calculate the total cost of the sweets:**
$$200p - 59p = 141p$$
5. **Find the cost of one packet:** Since there are 3 packets,
$$\frac{141p}{3} = 47p$$
**Final answer:** One packet of sweets costs **47 pence**.