यदि `+` को `xx` से , `-` को `+` से , `xx` को `div` से तथा `div` को `-` से दिखाया जाए तो `6-9+8 xx 3 div 20`

Options

A. -2
B. 6
C. 10
D. 12

Answer

To solve the problem step by step, we first need to replace the mathematical operations according to the instructions given in the question:

1. Replace `+` with `xx` (multiplication).
2. Replace `-` with `+` (addition).
3. Replace `xx` with `div` (division).
4. Replace `div` with `-` (subtraction).

Given expression:
\[ 6 - 9 + 8 \, xx \, 3 \, div \, 20 \]

### Step 1: Replace the operations
- Replace `-` with `+`:
\[ 6 + 9 + 8 \, xx \, 3 \, div \, 20 \]

- Replace `+` (the second one) with `xx` (multiplication):
\[ 6 + 9 + 8 \times 3 \, div \, 20 \]

- Replace `xx` with `div`:
\[ 6 + 9 + 8 \, div \, 3 \, - \, 20 \]

- Replace `div` with `-`:
\[ 6 + 9 + 8 - 3 - 20 \]

### Step 2: Simplify the expression
Now we can simplify the expression step by step:
1. Calculate \( 8 - 3 \):
\[ 8 - 3 = 5 \]

2. Now substitute that back into the expression:
\[ 6 + 9 + 5 - 20 \]

3. Next, calculate \( 6 + 9 \):
\[ 6 + 9 = 15 \]

4. Substitute that back:
\[ 15 + 5 - 20 \]

5. Now calculate \( 15 + 5 \):
\[ 15 + 5 = 20 \]

6. Substitute that back:
\[ 20 - 20 \]

7. Finally, calculate \( 20 - 20 \):
\[ 20 - 20 = 0 \]

### Final Answer:
The value of the expression \( 6 - 9 + 8 \, xx \, 3 \, div \, 20 \) after replacing the operations is \( 0 \).

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