The table lists the smoking habits of a group of college students.

Start 4 By 5 Table 1st Row 1st Column Sex 2nd Column Non dash smoker 3rd Column Regular Smoker 4st Column Heavy Smoker 5st Column Total 2nd Row 1st Column Man 2nd Column 135 3rd Column 50 4st Column 5 5st Column 190 3rd Row 1st Column Woman 2nd Column 187 3rd Column 21 4st Column 13 5st Column 221 4st Row 1st Column Total 2nd Column 322 3rd Column 71 4st Column 18 5st Column 411 EndTable

 Sex

 Non-smoker 

 Regular Smoker 

 Heavy Smoker 

 Total 

 Man

135

50

5

190

 Woman 

187

21

13

221

 Total

322

71

18

411

If a student is chosen at​ random, find the probability of getting someone who is a man or a woman. Round your answer to three decimal places.

To solve this problem, we need to determine the probability of selecting a student who is either a man or a woman from the group. Since every student in the group is either a man or a woman, the probability of selecting a man or a woman is actually 1 (100%).

However, I'll demonstrate the calculation to ensure clarity:

### Total Number of Students
The total number of students is given by the sum of the students listed in the last column of the table:
\[
\text{Total} = 411
\]

### Probability of Selecting a Man or a Woman
The probability of selecting a man or a woman is calculated as follows:

\[
P(\text{Man or Woman}) = \frac{\text{Total number of men and women}}{\text{Total number of students}}
\]

Given that all students are either men or women:
\[
P(\text{Man or Woman}) = \frac{411}{411} = 1
\]

### Final Answer
So, the probability is:
\[
\boxed{1.000}
\]

This probability is 1, meaning there's a 100% chance of selecting a student who is either a man or a woman.

Would you like more details, or do you have any other questions?

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Here are some related questions you might find useful:

1. What is the probability of selecting a non-smoker?
2. What is the probability of selecting a regular smoker?
3. What is the probability of selecting a heavy smoker?
4. What is the probability of selecting a man who is a non-smoker?
5. What is the probability of selecting a woman who is a regular smoker?
6. What is the probability of selecting a student who is either a regular or heavy smoker?
7. What is the probability of selecting a man who is a heavy smoker?
8. What is the probability of selecting a woman who is a non-smoker?

**Tip:** In probability, the sum of the probabilities of all mutually exclusive events that cover all possible outcomes always equals 1.

Calculate the probability of selecting a student who is either a man or a woman from a group based on smoking habits data. Understand how to apply basic probability concepts to real-world data analysis. Suitable for high school students learning probability.

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