The average length of first 3 fingers is 3 inches and the average length of the other 2 fingers i.e. thumb and the index finger is 2.8 inches. If the length of the index fingers is 3 inches then the length of the thumb is :

Options

A. 2 inches
B. 2.6 inches
C. 3 inches
D. none of these

Answer

To solve the problem step by step, we will follow these calculations:

### Step 1: Understand the given information
We know that:
- The average length of the thumb and the index finger is 2.8 inches.
- The length of the index finger is 3 inches.