`8+4-:2xx5=`?

Options

A. `30`
B. `50`
C. `18`
D. none of these

Answer

To solve the expression \( 8 + 4 -: 2 \times 5 \), we will follow the order of operations, commonly referred to as BODMAS/BIDMAS (Brackets, Orders, Division and Multiplication, Addition and Subtraction).

### Step-by-Step Solution:

1. **Identify the operations**: The expression consists of addition (+), division (-:), and multiplication (×).

2. **Rewrite the expression**: The expression can be rewritten for clarity as:
\[ 8 + 4 \div 2 \times 5 \]

3. **Apply BODMAS**: According to BODMAS, we first perform division and multiplication from left to right.

4. **Perform the division**:
\[ 4 \div 2 = 2 \]
Now, substitute back into the expression:
\[ 8 + 2 \times 5 \]

5. **Perform the multiplication**:
\[ 2 \times 5 = 10 \]
Substitute back into the expression:
\[ 8 + 10 \]

6. **Perform the addition**:
\[ 8 + 10 = 18 \]

### Final Answer:
The final value of the expression \( 8 + 4 -: 2 \times 5 \) is \( 18 \).