Bhagwanti inherited Rs 12000.00. She invested part of it as 10% and the rest at 12%. Her annual income from these from investments is Rs 1280.00. How much did she invest at each rate?

Explanation

To solve the problem, we will define the variables, set up the equations based on the information provided, and then solve for the amounts invested at each interest rate.

### Step-by-Step Solution:

1. **Define the Variables**:
Let \( X \) be the amount invested at 10%. Therefore, the amount invested at 12% will be \( 12000 - X \).

2. **Set Up the Equation for Annual Income**:
...