What will come in place of '?' in the following equation, if '-' and '×' are interchanged and '+' and '÷' are interchanged?
7 + 7 × 3 - 4 ÷ 5 = ?

Given: 

'-' and '×' are interchanged

'+' and '÷' are interchanged
7 + 7 × 3 - 4 ÷ 5 = ?

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

After interchange the sing we get following equation - 

7 + 7 × 3 - 4 ÷ 5 = ?
7 ÷ 7 - 3 × 4 + 5 = ?
1 - 12 + 5 = ?
6 - 12 = ?
? = -6

Correct answer is (b) -6.
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