Write the negation of each of the disjunction:
Ram is in class X or Rina is in Class IX.

Answer

To find the negation of the disjunction "Ram is in class X or Rina is in Class IX," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Statements**:
- Let \( P \): "Ram is in class X."
- Let \( Q \): "Rina is in class IX."

2. **Formulate the Disjunction**:
- The original statement is \( P \lor Q \) (P OR Q).

3. **Apply the Negation**:
- The negation of a disjunction \( P \lor Q \) is given by De Morgan's Laws, which state that:
\[ \neg(P \lor Q) \equiv \neg P \land \neg Q \]
- This means that the negation of "P or Q" is equivalent to "not P and not Q".

4. **Negate Each Statement**:
- Negate \( P \): "Ram is not in class X" (denoted as \( \neg P \)).
- Negate \( Q \): "Rina is not in class IX" (denoted as \( \neg Q \)).

5. **Combine the Negated Statements**:
- Using the conjunction (AND), we combine the negated statements:
\[ \neg P \land \neg Q \]
- This translates to: "Ram is not in class X and Rina is not in class IX."

### Final Answer:
The negation of the statement "Ram is in class X or Rina is in Class IX" is:
**"Ram is not in class X and Rina is not in class IX."**

---