Question

3.
A box contains 9 white balls and 1 black ball while another box contains 10 white balls. 9
balls are selected from the first box and placed in the second box. After that 9 balls are
selected from the second box and placed in the first box. The probability that the black ball
is in the first box is .........​

Answer 1

Answer:

1/2

Step-by-step explanation:

the probability that the black balls in the first box is 1/2