Probability: Selecting a Student from a Group (Algebraic Form)

Probability: Selecting a Student from a Group (Algebraic Form)

Secondary 2

There are \(50\) students in an auditorium, of which \(2x\) are boys and \(y\) are girls. After \(\left( y-6 \right)\) boys leave the auditorium and \(\left( 2x-5 \right)\) girls enter the auditorium, the probability of selecting a girl at random becomes \(\frac{9}{13}\). Find the value of \(x\) and of \(y\).

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Answer:\(x=16\), \(y=18\)

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