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Each of the \(30\) students in a class studies at least one of Chinese and French. \(16\) study Chinese and \(20\) study French.
(i) Find the probability that a randomly chosen student studies Chinese.
(ii) Two different students are chosen at random. Find the probability that both study Chinese.
(iii) Find the probability that a randomly chosen student studies only one language.
Give any fraction answers in simplest form.
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