Question

the following information is from a survey about smoking and lung disease among 250 people.

	lung disease	no lung disease	total
no smoking	60	40	100
total	150	100	250

match the following with their correct answers.

• this many people in the survey did not have lung disease.
• this many people in the survey were smokers.
• this many people were not smokers but had lung disease.

1. 60%
2. 40%
3. 24%

Explanation:

Step1: Find no lung disease count

From table, "No lung disease" total is 100.

Step2: Calculate smokers percentage

Smokers total = 150, total people = 250. Percentage: $\frac{150}{250} \times 100\% = 60\%$.

Step3: Calculate non-smokers with lung disease percentage

Non-smokers with lung disease = 60. Percentage: $\frac{60}{250} \times 100\% = 24\%$.

Answer:

• This many people in the survey did not have lung disease: 100
• This many people in the survey were smokers: 1. 60%
• This many people were not smokers but had lung disease: 3. 24%