A bag contains 30 balls of which \( \mathrm{x} \) are red, \( 2 \mathrm{x} \) are yellow and \( ...

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A bag contains 30 balls of which \( \mathrm{x} \) are red, \( 2 \mathrm{x} \) are yellow and \( 3 \mathrm{x} \) are blue. A ball is selected at random. What is the probability that it is
(i) not red ?
(ii) yellow ?
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