Probability: Drawing a Ball from a Box (Algebraic Form)
Probability: Drawing a Ball from a Box (Algebraic Form)
Secondary 2
A box contains \(x\) red balls, \(\left( 2x-3 \right)\) green balls and \(\left( 22-4x \right)\) blue balls.
- Find an expression, in terms of \(x\), for the total number of balls in the box.
A ball is drawn at random from the box.
- Write down an expression, in terms of \(x\), for the probability that the ball is blue.
- It is known that the probability when a blue ball is drawn is \(\frac{5}{8}\), find the value of \(x\).
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Answer:(i) \(19-x\) (ii) \(\frac{22-4x}{19-x}\) (iii) \(x=3\)
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