Concept: Use the BODMAS rule to decide the order of operations: Brackets, Order, Division, Multiplication, Addition, Subtraction.
Explanation: Solve from the innermost brackets outward.
First, evaluate the inner round brackets:
(12−7)=5 and
(11−3−2)=6.
Inside the curly bracket, perform multiplication and division from left to right:
12×5÷6=60÷6=10.
Now simplify the square bracket:
12×10=120.
Multiply by the number outside the bracket:
12×120=1440.
Finally, add 15 to the result:
1440+15=1455.
Answer: The value of '?' is
1455, so the correct option is C.