A university employs a total of 600 teaching assistants and research assistants. There are four times as many teaching assistants as research assistants. Find the number of research assistants employed by the university.
Let the number of research assistants be "x"
Then the number of teaching assistants be "3x"
Then ,
"x + 4x=600"
"5x = 600"
"x = \\frac{600}{5}"
"x = 300"
Hence the number of research assistants is 300
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