Final answer:
This is a question related to mathematical operations and order of operations. By following the BODMAS/PEDMAS rule, the answer to the question is calculated to be 16 which is not listed in the given options. This indicates that there may be a mistake in the question or the options provided.
Step-by-step explanation:
The question is asking for the result of the given mathematical expression. To calculate it, we need to follow the order of operations rule, also known as BODMAS or PEDMAS, which stands for Brackets, Orders or Exponents, Division and Multiplication (from left to right), Addition and Subtraction (from left to right).
Step 1: Solve the expression in the curly and square brackets first. That is {10 - (7 - 5 - 3)}. The parentheses inside the curly brackets gives (7 - 5 - 3) = -1. So, now we have {10 - (-1)}, which equals 11.
Step 2: Now substitute this result into the square brackets. We now have {20 - 11}, which is 9.
Step 3: Then, substitute this into the original expression, we get 25 - 9, which is 16. Therefore, the result of the given expression is 16, which is not listed in the provided options. So, I'm afraid there may be an error in the question or the options provided.
Learn more about Order of Operations