If + means −, − means ×, × means ÷, and ÷ means +, what will come in place of the question mark (?) in the following equation?
15 – 3 ÷ 5 + 18 × 6 = ?​

Given sign	+	−	×	÷
New sign	−	×	÷	+

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

New equation: 15 – 3 ÷ 5 + 18 × 6
= 15 × 3 + 5 − 18 ÷ 6

= 15 × 3 + 5 − 3

= 45 + 5 − 3

= 50 − 3
= 47

Thus, correct option is (d).