What will come in the place of the question mark '?' in the following question?
`25%` of `400-:8xx4+25-17=` ?

Options

A. `11.125`
B. 50
C. 55
D. 58

Answer

To solve the expression `25% of 400 -: 8xx4 + 25 - 17 = ?`, we will follow the order of operations, often remembered by the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)).

### Step-by-Step Solution:

1. **Calculate 25% of 400**:
\[ 25\% \text{ of } 400 = \frac{25}{100} \times 400 = \frac{25 \times 400}{100} = \frac{10000}{100} = 100 \]

**Hint**: To find a percentage of a number, multiply the percentage (as a fraction) by the number.

2. **Divide 100 by 8**:
\[ 100 \div 8 = 12.5 \]

**Hint**: Division is performed next as per the order of operations.

3. **Multiply the result by 4**:
\[ 12.5 \times 4 = 50 \]

**Hint**: After division, we perform multiplication.

4. **Add 25 to the result**:
\[ 50 + 25 = 75 \]

**Hint**: Addition is performed after multiplication.

5. **Subtract 17 from the result**:
\[ 75 - 17 = 58 \]

**Hint**: Finally, perform subtraction to get the final result.

### Conclusion:
The value that comes in place of the question mark '?' is **58**.

**Final Answer**: 58