Which two numbers should be interchanged to make the given equation correct?
700 + 42 ÷ 6 × 45 – 54 × 9 + 14 = 355

700 + 42 ÷ 6 × 45 – 54 × 9 + 14 = 355

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

a) 9 and 14

After interchange

700 + 42 ÷ 6 × 45 – 54 × 14 + 9 = 355

700 + 315 – 756 + 9 = 355

1024 – 756 = 355 

268 = 355 (Incorrect)

b) 6 and 14

After interchange

700 + 42 ÷ 14 × 45 - 54 × 9 + 6 = 355

700 + 3 × 45 - 486 + 6 = 355

700 + 135 - 486 + 6 = 355

841 - 486 = 355

Thus, correct option is (b).