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Look at the chart and answer the questions.

1. According to this chart, what percentage of 12th-graders smoked no cigarettes at all?

2. What is the smallest category of smokers?

3. What percentage smoked any cigarettes?

4. Approximately what fraction of 12th-graders does not smoke at all? (You’ll need to convert a percentage to a fraction.)

5. In 1975, 37% of high school seniors had smoked cigarettes in the past 30 days. In 2000, it was a lower percentage (see answer to #3). What reasons might account for this decrease?

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