Which two numbers should be interchanged to make the given equation correct?
75 ÷ 5 + 15 × 4 - 17 × 3 + (60 ÷ 6) × 10 = 100
(Note: Interchange should be done of the entire number and not individual digits of a given number.)

Given 75 ÷ 5 + 15 × 4 - 17 × 3 + (60 ÷ 6) × 10 = 100:

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

Option (a); ​5 and 3

New equation: 75÷ 3 +15×4 - 17 ×5 + (60 ÷ 6) ×10 = 100

25 +15×4 - 17 ×5 +10×10 = 100 

25 + 60 - 85 + 100 = 100

185 - 85 = 100

100 = 100 (Follows)

Thus, correct option is (a).

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