18 In a class with a number of students, $$ 25 \% $$ prefer reading scientific books, $$ 60 \% $$ prefer reading stories and novels, and the remainder prefer reading poetry. If one student is chosen randomly, the probability that they prefer reading poetry is …

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1. The total percentage of students is $$100\%$$.

2. Students who prefer scientific books: $$25\%$$.

3. Students who prefer stories and novels: $$60\%$$.

4. The percentage of students who prefer poetry is:
   $$
   100\% - 25\% - 60\% = 15\%
   $$

5. Therefore, the probability that a randomly chosen student prefers reading poetry is:
   $$
   15\%
   $$
The probability that a randomly chosen student prefers reading poetry is 15%.

18 In a class with a number of students, prefer reading scientific books, prefer reading stories and novels, and the remainder prefer reading poetry. If one student is chosen randomly, the probability that they prefer reading poetry is …

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