To find the mean life span of the farm animals, we first need to sum the life spans of all the animals and then divide that sum by the total number of animals.
The life spans of the animals are as follows:
- Chicken: 7 years
- Duck: 10 years
- Horse: 22 years
- Pig: 10 years
- Sheep: 12 years
- Cow: 10 years
- Goat: 12 years
Now, let's sum these values:
\[ 7 + 10 + 22 + 10 + 12 + 10 + 12 = 93 \text{ years} \]
Next, we count the number of animals:
- Total number of animals = 7
Now we can calculate the mean life span:
\[ \text{Mean} = \frac{\text{Total Life Span}}{\text{Number of Animals}} = \frac{93}{7} \approx 13.29 \text{ years} \]
Since 13.29 years is not in the given response list, it appears none of the answers provided accurately reflect the calculated mean lifespan. However, if we are looking for the closest option or if we have to take an average of the provided options, we would typically provide the mean calculated.
Consequently, based on the provided options, it would be inaccurate to select one as they don't correspond to the actual mean of the calculated life spans.
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