To find the percentage of left-handed men who smoke, compare the number of left-handed men who smoke with the total number of men who smoke. The correct part is option 3: smokers that are left-handed.
The question is asking for the percentage of men that smoke who are left-handed. To find this percentage, we need to compare the number of left-handed men who smoke with the total number of men who smoke.
For example, if there are 100 men who smoke and 10 of them are left-handed, then the percentage of men who smoke and are left-handed would be 10%.
Therefore, the correct part would be option 3: smokers that are left-handed.
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