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Omni-MATH / At a tennis tournament there were 2n boys and n girls participating. Every player played every other player. The boys won (7)/(5) times as many matches as the girls. It is knowns t…

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problem

At a tennis tournament there were 2n2n boys and nn girls participating. Every player played every other player. The boys won 75\frac 75 times as many matches as the girls. It is knowns that there were no draws. Find nn .
Plain-text mathematical notation (without MathML)
At a tennis tournament there were 2n boys and n girls participating. Every player played every other player. The boys won (7)/(5) times as many matches as the girls. It is knowns that there were no draws. Find n .
Original LaTeX notation
At a tennis tournament there were $2n$ boys and $n$ girls participating. Every player played every other player. The boys won $\frac 75$ times as many matches as the girls. It is knowns that there were no draws. Find $n$ .

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