What will come in the place of ‘?’ in the following equation, if ‘+’ and ‘–‘ are interchanged and ‘×’ and ‘÷’ are interchanged?

$5-4÷9+80\times 10=?$

The correct option is 33.

To find the value that comes in place of '?', we need to follow the interchanging instructions given in the question:

- Interchange '+' and '–' (replace '+' with '–' and vice versa)

- Interchange '×' and '÷' (replace '×' with '÷' and vice versa)

The original equation is:

$5-4÷9+80\times 10=?$

Applying the interchanges, the new equation becomes:

$5+4*9-80÷10=?$

Now, we solve this mathematical expression step-by-step using the BODMAS rule (Division, Multiplication, Addition, Subtraction):

Step 1: Division

First, perform the division operation ($80÷10$):

$80÷10=8$

Substitute this back into the equation:

$5+4\times 9-8=?$

Step 2: Multiplication

Next, perform the multiplication operation ($4\times 9$):

$4\times 9=36$

Substitute this back into the equation:

$5+36-8=?$

Step 3: Addition

Now, perform the addition operation ($5+36$):

$5+36=41$

Substitute this back into the equation:

$41-8=?$

Step 4: Subtraction

Finally, perform the subtraction operation ($41-8$):

$41-8=33$

Therefore, the value in place of '?' is 33.