Final answer:
To simplify the expression 3×{[(65-49)+(42÷7)]÷2}, first simplify the innermost parentheses, then divide and multiply according to the order of operations. None of the given options are correct.
Step-by-step explanation:
To simplify the expression 3×{[(65-49)+(42÷7)]÷2}, we need to start by simplifying the innermost parentheses first.
Inside the parentheses, we have (65-49) which equals 16.
Then, we have (42÷7) which equals 6.
Next, we simplify the outer set of parentheses by adding 16 and 6, which equals 22.
Now, we divide 22 by 2, which equals 11.
Finally, we multiply 11 by 3, which gives us the final answer of 33.
Therefore, the correct answer is 33.
So, none of the given options are correct.