Final answer:
To find the cost of 5 biscuits when 11 biscuits cost £10.45, calculate the cost per biscuit (£0.95) and then multiply by 5, resulting in a total cost of £4.75 for 5 biscuits.
Step-by-step explanation:
The subject of this question is Mathematics, specifically pertaining to unit price and proportional reasoning. To calculate the cost of 5 biscuits when 11 biscuits cost £10.45, we first find the cost of one biscuit by dividing the total cost by the number of biscuits. Then, we multiply the cost of one biscuit by the number of biscuits we want to find the cost for.
First, we calculate the cost per biscuit:
- Total cost for 11 biscuits = £10.45
- Cost per biscuit = £10.45 / 11 biscuits
- Cost per biscuit = £0.95
Next, we calculate the cost for 5 biscuits:
- Cost of 5 biscuits = 5 × Cost per biscuit
- Cost of 5 biscuits = 5 × £0.95
- Cost of 5 biscuits = £4.75
Therefore, the cost for 5 biscuits will be £4.75.