Simplify 12 of 3 – 24 of 4 ÷ 12.

Correct option is A

Given: 

​12 of 3 – 24 of 4 ÷ 12 

Concept Used:  

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

Solution: 

= 12 of 3 – 24 of 4 ÷ 12 

= 36 – 96 ÷ 12

= 36 – 8

= 28

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