Question

According to an almanac, 70% of adult smokers started smoking before turning 18 years old. If 300 adult smokers are randomly selected, how many would we expect to have started smoking before the age of 18?

Answer 1

To determine how many out of 300 randomly selected adult smokers started before age 18, multiply the total number (300) by 0.70 based on the almanac's statistic that 70% started young, resulting in 210 smokers.

Step-by-step explanation:

To calculate the number of adult smokers we would expect to have started smoking before the age of 18, we use the given percentage and multiply it by the total number of adult smokers. The almanac states that 70% of adult smokers started smoking before turning 18 years old. If 300 adult smokers are randomly selected, the expected number would be 70% of 300.

Calculate this by:

• Multiplying 300 by 0.70 (which represents 70%)
• 300 × 0.70 = 210

Therefore, we would expect that 210 out of the 300 randomly selected adult smokers started smoking before the age of 18.