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A group of people were asked if they owned a dog. 130 responded "yes", and 428 responded "no".

Find the probability that if a person is chosen at random, they own a dog.

A. [tex]\frac{130}{428}[/tex]
B. [tex]\frac{130}{558}[/tex]
C. [tex]\frac{298}{130}[/tex]


Sagot :

Alright, let's break this down step-by-step to find the probability that a randomly chosen person from this group owns a dog.

1. Number of people who responded "yes":
We know that 130 people responded that they own a dog.

2. Number of people who responded "no":
We know that 428 people responded that they do not own a dog.

3. Calculate the total number of responses:
To find the total number of people who were surveyed, we add the number of "yes" responses and "no" responses:
[tex]\[ \text{Total responses} = \text{Number of "yes" responses} + \text{Number of "no" responses} = 130 + 428 = 558 \][/tex]

4. Determine the probability that a randomly chosen person owns a dog:
Probability is calculated as the number of favorable outcomes divided by the total number of possible outcomes. In this case, the favorable outcome is someone who owns a dog ("yes" response):
[tex]\[ \text{Probability} = \frac{\text{Number of "yes" responses}}{\text{Total responses}} = \frac{130}{558} \][/tex]

So, the probability that a randomly chosen person owns a dog is:
[tex]\[ \frac{130}{558} \][/tex]

Among the provided options:
- [tex]\(\frac{130}{428}\)[/tex] is incorrect because 428 represents the number of "no" responses, not the total.
- [tex]\(\frac{298}{130}\)[/tex] is incorrect because 298 is not relevant to our calculation.

Therefore, the correct option is:
[tex]\[ \frac{130}{558} \][/tex]

Numerically, this probability is approximately [tex]\(0.233\)[/tex], indicating that there is roughly a 23.3% chance that a randomly selected person from this group owns a dog.