What should come in place of the question mark '?' in the following question?

$10\%\text{ of }450-(8\times 5)=?\times 5$

The correct option is 1.

Let us solve the given mathematical equation step-by-step to find the value that replaces the question mark ($?$).

The given equation is:

$10\%\text{ of }450-(8\times 5)=?\times 5$

Step 1: Calculate the percentage part, $10\%\text{ of }450$.

$10\%\text{ of }450=\frac{10}{100}\times 450=45$

Step 2: Calculate the multiplication inside the bracket, $(8\times 5)$.

$8\times 5=40$

Step 3: Substitute these values back into the left-hand side of the equation.

$45-40=5$

Step 4: Now, solve for the unknown value ($?$).

Let the question mark be represented by $x$:

$5=x\times 5$

$x=\frac{5}{5}$

$x=1$

Therefore, the value that replaces the question mark is 1.