2000 AMC 10 竞赛试题/第6题
Problem
At Olympic High School, 
of the freshmen and 
of the sophomores took the AMC-10. Given that the number of freshmen and sophomore contestants was the same, which of the following must be true?
There are five times as many sophomores as freshmen.
There are twice as many sophomores as freshmen.
There are as many freshmen as sophomores.
There are twice as many freshmen as sophomores.
There are five times as many freshmen as sophomores.
Solution
Let 
be the number of freshman and 
be the number of sophomores.
There are twice as many freshmen as sophomores. 
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