Which of the following options is the closest approximate value which will come in place of question mark(?) in the following equation?  $$7.98 \times 2 + 3.96 \times 6 - {18}÷{2} + 1$$​​

Correct option is C

Given : 

The Equation : 7.98 $$\times$$ 2 + 3.96 $$\times$$ 6 - 18 $$\div$$ 2 + 1 

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 : ​

Approximate value of 

7.98 $$\approx$$ 8

3.96 $$\approx$$ 4

Now, Simplifying the equation : 

8 $$\times$$ 2 + 4 $$\times$$ 6 - 18 $$\div$$ 2 + 1

= 8 $$\times$$ 2 + 4$$\times$$​ 6 - 9 + 1 

= 16 + 24 - 8 

= 16 + 16 

= 32

​Closest approximate value : 32

The closest option is(c) 32.
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