What will come in place of question mark (?) .
`10xx10% + 10% - 5 = ?`

Options

A. 5
B. 6
C. -3.9
D. 2

Answer

To solve the expression \(10 \times 10\% + 10\% - 5 = ?\), we will follow the order of operations, often remembered by the acronym BODMAS (Brackets, Orders, Division and Multiplication, Addition and Subtraction).

### Step-by-Step Solution:

1. **Convert percentages to fractions**:
- \(10\% = \frac{10}{100} = \frac{1}{10}\)

2. **Rewrite the expression**:
- The expression becomes:
\[ 10 \times \frac{1}{10} + \frac{1}{10} - 5 \]

3. **Perform the multiplication**:
- Calculate \(10 \times \frac{1}{10}\):
\[ 10 \times \frac{1}{10} = 1 \]

4. **Substitute back into the expression**:
- Now the expression is:
\[ 1 + \frac{1}{10} - 5 \]

5. **Convert the whole numbers to fractions for easier addition/subtraction**:
- Convert \(1\) and \(5\) to fractions with a common denominator of \(10\):
\[ 1 = \frac{10}{10}, \quad 5 = \frac{50}{10} \]

6. **Rewrite the expression with fractions**:
- The expression now looks like:
\[ \frac{10}{10} + \frac{1}{10} - \frac{50}{10} \]

7. **Combine the fractions**:
- Add and subtract the fractions:
\[ \frac{10 + 1 - 50}{10} = \frac{-39}{10} \]

8. **Convert to decimal form**:
- Divide \(-39\) by \(10\):
\[ -39 \div 10 = -3.9 \]

### Final Answer:
\[ ? = -3.9 \]