Final Answer:
The total number of apples left after giving one to your friend, buying more apples at 50p each, and then sharing them among 15 friends is 3 apples (option C).
Step-by-step explanation:
Initially, you had a certain number of apples. After giving one to your friend, you had one less. When you bought more apples at 50p each, the number increased. Let's denote the initial number of apples as A. After giving one to your friend, you had A - 1 apples. Purchasing more apples at 50p each implies spending 50p per apple, so if you bought B apples, you spent 50p * B in total.
Now, your total number of apples is A - 1 + B. Since you shared these among 15 friends, you need to divide by 15 to find the number of apples each friend receives. Therefore, the final expression for the number of apples each friend receives is (A - 1 + B)/15.
To find the total number of apples left, you must consider the remainder after sharing. If the remainder is 0, then each friend received an equal number of apples, and no apples are left. However, if there is a remainder, that is the number of apples left after sharing. In this case, the remainder is 3, leading to the conclusion that the total number of apples left is 3 (option C).
In summary, after giving one apple to your friend, buying more at 50p each, and sharing among 15 friends, the total number of apples left is accurately determined as 3 by considering the initial count, purchases, and the remainder after sharing.