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There are two empty bowls in a room. You have 50 white balls and 50
black balls. After you place the balls in the bowls, a random ball will
be picked from a random bowl. Distribute the balls (all of them) into
the bowls to maximize the chance of picking a white ball.
This is the way to maximize the chances!
What was the task given?
Let's distribute 50 black ball in one bowl & other 50 white ball in another bowl.
Then,
Probability (White Ball) = (1/2)(0/50) + (1/2)(50/50) = 0.5.
Now, if 1 white ball is kept in 1 bowl and other 49 white + 50 black = 99 balls in other bowl, then
Probability (White Ball) = (1/2)(1/1) + (1/2)(49/99) = 0.747.
That's nearly equal to 3/4 which is certainly higher than the previous case. And that's the way of maximizing the probability of white ball.