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A box contains only white balls and black balls. What is the probability that a ball selected at random from the box is white?
(1) There are 100 balls in the box.
(2) There are 40 black balls in the box.
Answer: C
Source: Official Guide
(1) There are 100 balls in the box.
(2) There are 40 black balls in the box.
Answer: C
Source: Official Guide
