For A, B and C the chances of being selected as the manager of a firm are in the ratio 4:1:2 respectively. The respective probabilities fro them to introduce a radical change in marketing strategy are 0.3, 0.8, and 0.5. if the change does take place, find the probability that it is due to the appointment of B or C.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Determine the probabilities of selecting A, B, and C
The chances of A, B, and C being selected as the manager are in the ratio 4:1:2.

Let the total ratio be:
- A = 4 parts
- B = 1 part
...