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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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