If ‘P’ stands for ‘×’, ‘Q’ stands for ‘÷’, ‘R’ stands for ‘−’ and ‘S’ stands for ‘+’, then what will come in place of the question mark (?) in the following equation?
(11 S 7) P 3 R 41 S 8 P 12 R 54 = ?​

Given: (11 S 7) P 3 R 41 S 8 P 12 R 54 = ?

Given equation is solve by BODMAS rule.

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

New equation: (11 + 7) $$\times$$​ 3 - 41 + 8 $$\times$$​ 12 - 54 = ?

18 $$\times$$​​ 3 - 41 + 8 $$\times$$​​ 12 - 54 = ?

54 - 41 + 96 - 54 = ?

150 -  95 = ?

? = 55

Thus, correct option is (b).