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    What will come in the place of the question mark (?) in the following equation, if ‘+’ and ‘− ’ are interchanged and ‘×’ and ‘÷’ are interchanged? 8
    Question

    What will come in the place of the question mark (?) in the following equation, if ‘+’ and ‘− ’ are interchanged and ‘×’ and ‘÷’ are interchanged?
    8 ÷ 5 + 20 × 4 - 9 = ? 

    A.

    50

    B.

    45

    C.

    40

    D.

    44

    Correct option is D

    Given:
    8 ÷ 5 + 20 × 4 − 9 = ? 
    Rule: + ↔ − and × ↔ ÷
    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}
    After Interchange the sign equation will be:
    ​8 × 5 − 20 ÷ 4 + 9 = ?
    ? = 8 × 5 − 5 + 9
    ? = 40 − 5 + 9
    ? = 49 − 5
    ? = 44
    Thus, the correct option is: (d)

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