If ‘A’ stands for ‘÷’ , ‘B’ stands for ‘x’, ‘C’ stands for ‘+’ and ‘D’ stands for ‘-‘ , what will be come in place of question mark ‘?’ in the following equation?
15 A 3 B 10 C 8 D 12 = ?

The correct option is 46.

To solve the given mathematical expression, we first substitute the letters with their corresponding mathematical operators as defined in the question:

• 'A' stands for division (÷)
• 'B' stands for multiplication (×)
• 'C' stands for addition (+)
• 'D' stands for subtraction (-)

The given equation is:
15 A 3 B 10 C 8 D 12 = ?

Replacing the letters with their respective arithmetic operations, we get:

$15÷3\times 10+8-12$

Now, we evaluate the expression step-by-step using the standard order of operations (BODMAS / PEMDAS rule: Division and Multiplication from left to right, followed by Addition and Subtraction from left to right):

Step 1: Perform Division
Divide 15 by 3:

$15÷3=5$

Substitute this value back into the equation:

$5\times 10+8-12$

Step 2: Perform Multiplication
Multiply 5 by 10:

$5\times 10=50$

Substitute this value back into the equation:

$50+8-12$

Step 3: Perform Addition
Add 50 and 8:

$50+8=58$

Step 4: Perform Subtraction
Subtract 12 from 58:

$58-12=46$

Therefore, the value that comes in place of the question mark '?' is 46.