Question 160
A box contains 3 white balls and 2 black balls. Marco draws one ball, returns it, and adds another ball of the same color. He then draws a new ball. What is the probability that the latter ball is white?
(A) $1/2$
(B) $7/12$
(C) $3/5$
(D) $2/3$
(E) None of the above.
(A) $1/2$
(B) $7/12$
(C) $3/5$
(D) $2/3$
(E) None of the above.