As part of a promotion, both you and your roommate are given free cellular phones from a batch
of 13 phones. Unknown to you, four of the phones are faulty and do not work. Find the
probability that one of the two phones is faulty.
A) .077 B) .231 C) .538 D) .462
Question 2
At the U.S. Open Tennis Championship a statistician keeps track of every serve that a player hits
during the tournament. The lower quartile of a particular player's serve speeds was reported to
be 99 mph.
Which of the following interpretations of this information is correct?
A) 75 of the player's serves were hit at speeds greater than 99 mph.
B) 99 serves traveled faster than the lower quartile.
C) 25 of the player's serves were hit at 99 mph.
D) 75 of the player's serves were hit at speeds less than 99 mph.
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