Evaluate: 20-3 × (4+1) ÷ 2.

Correct option is C

Given:

20-3 × (4+1) ÷ 2. 

Concept Used:

​$$\begin {array}{|c|c|} \hline \textbf{Operation preference wise} & \textbf{Symbol} \\ \hline Brackets &[],{}, () \\ \hline Orders, of & ² (power), √ (root) , of \\ \hline Division & ÷ \\ \hline Multiplication & × \\ \hline Addition & + \\ \hline Subtraction & - \\ \hline \end{array}$$​​
Solution:

= 20-3 × (4+1) ÷ 2
= 20-3 × 5 ÷ 2

= $$20-3 × \frac5 2$$​​
= 20-7.5 = 12.5