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What will come in place of the question mark (?) in the following equation, if ‘+’ and ‘−’ are interchanged and ‘×’ and ‘÷’ are interchanged? 30 ÷ 3 +
Question

What will come in place of the question mark (?) in the following equation, if ‘+’ and ‘−’ are interchanged and ‘×’ and ‘÷’ are interchanged?
30 ÷ 3 + 14 × 2 − 6 = ?

A.

87

B.

89

C.

91

D.

85

Correct option is B

Given: 30 ÷ 3 + 14 × 2 − 6 = ?
The + and - are interchanged.
The × and ÷ are interchanged.
Operation preference wiseSymbolBrackets[],,()Orders, of(power),(root),ofDivision÷Multiplication×Addition+Subtraction\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}​​
So the original equation:
30 ÷ 3 + 14 × 2 - 6 = ?
30 × 3 - 14 ÷ 2 + 6 = ?
30 × 3 – 7 + 6 = ?
90 – 7 + 6 = ?
96 – 7 = ?
89 
Thus, the correct option is (b) 89.

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