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Zoonotic disease outbreaks are infectious disease outbreaks in humans caused by pathogens from wild or domesticated animals. Suppose two pathogen genotypes occur in chickens, and one of them is accidentally transmitted to a farmer. The probability of selecting type 1 is 0.63, and the probability of selecting type 2 is 0.37. If type 1 is transmitted, an outbreak will occur with probability 0.51. If type 2 is transmitted, an outbreak will occur with probability 0.19.

What is the overall probability of an outbreak? Round your answer to five decimal places.

Answer :

The overall probability of an outbreak from chicken pathogens transmitted to humans is approximately 0.3916.

To find the overall probability of an outbreak, we can use the law of total probability, which states:

[tex]\[ P(\text{Outbreak}) = P(\text{Outbreak} | \text{Type 1}) \times P(\text{Type 1}) + P(\text{Outbreak} | \text{Type 2}) \times P(\text{Type 2}) \][/tex]

Given:

- [tex]\( P(\text{Outbreak} | \text{Type 1}) = 0.51 \)[/tex]

- [tex]\( P(\text{Outbreak} | \text{Type 2}) = 0.19 \)[/tex]

- [tex]\( P(\text{Type 1}) = 0.63 \)[/tex]

- [tex]\( P(\text{Type 2}) = 0.37 \)[/tex]

Let's calculate:

1. Probability of outbreak given Type 1:

[tex]\[ P(\text{Outbreak} | \text{Type 1}) = 0.51 \][/tex]

2. Probability of outbreak given Type 2:

[tex]\[ P(\text{Outbreak} | \text{Type 2}) = 0.19 \][/tex]

3. Overall probability of outbreak:

[tex]\[ P(\text{Outbreak}) = (0.51 \times 0.63) + (0.19 \times 0.37) \][/tex]

Now, let's compute this:

[tex]\[ P(\text{Outbreak}) = (0.51 \times 0.63) + (0.19 \times 0.37) \][/tex]

[tex]\[ P(\text{Outbreak}) = (0.3213) + (0.0703) \][/tex]

[tex]\[ P(\text{Outbreak}) = 0.3916 \][/tex]

So, the overall probability of an outbreak is approximately [tex]\( 0.3916 \)[/tex] when rounded to five decimal places.

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Rewritten by : Jeany