The number of flags with three strips in order, that can be formed using 2 indentical red, 2 identical blue and 2 identical white strips is

Options

A. 24
B. 20
C. 90
D. 8

Answer

To solve the problem of finding the number of flags that can be formed using 2 identical red, 2 identical blue, and 2 identical white strips, we can follow these steps:

### Step 1: Identify Possible Combinations
We need to form flags with 3 strips. The possible combinations of strips can be:
1. 1 Red, 1 Blue, 1 White (1R, 1B, 1W)
2. 2 Red, 1 Blue (2R, 1B)
3. 2 Red, 1 White (2R, 1W)
4. 2 Blue, 1 Red (2B, 1R)
5. 2 Blue, 1 White (2B, 1W)
6. 2 White, 1 Red (2W, 1R)
7. 2 White, 1 Blue (2W, 1B)