What will come in place of the question mark (?) in the following equation, if ‘+’ and ‘–’ are interchanged and ‘×’ and ‘÷’ are interchanged?
321 – 371 ÷ 22 + 216 × 6 = ?

​$$321 - 371 \div 22 \ + \ 216 \ \times 6 = \ ?$$​​

'$$+$$' and '$$-$$' are interchanged, and '$$\times$$' and '$$\div$$' are interchanged.​

Concept: To solve this, interchange the signs as directed in the statement in the given equation to solve the equation. For this, we follow the BODMAS rule.

​$$\begin{array}{|c|c|}\hline\textbf{Operation preference wise} & \textbf{Symbol} \\\hline\text{Brackets} & [ \ ], ( \ ) \\\text{Orders, of} & power, root, of \\\text{Division} & \div \\\text{Multiplication} & \times\\\text{Addition} & +\\\text{Subtraction} & -\\\hline\end{array}$$​​

After interchanging the symbols, we get, $$321 - 371 \ \div \ 22 \ + 216 \times 6 \ = \ ?$$

$$(?) = 8447$$​​​​​​​​

The final answer is 8447.

Thus, option (d) is the correct answer.