A bag contains n balls, one of which is white. The probability that A and B speak truth are `P_(1) and P_(2),` respectively. One ball is drwn from the bag and A and B both assert that it is white. Find the probability that drawn ball is actually white.

Explanation

To solve the problem, we will use Bayes' theorem to find the probability that the drawn ball is actually white given that both A and B assert that it is white.

### Step 1: Define the Events
Let:
- \( W \): the event that the drawn ball is white.
- \( N \): the event that the drawn ball is not white.
- \( A_T \): the event that A speaks the truth.
- \( B_T \): the event that B speaks the truth.
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