To find the mean life span of the farm animals, we first need to sum the life spans of each animal and then divide by the total number of animals.
Here are the life spans given in the question:
- Chicken: 7 years
- Duck: 10 years
- Horse: 22 years
- Pig: 10 years
- Sheep: 12 years
- Cow: 10 years
- Goat: 12 years
Now let's calculate the total life span:
\[ 7 + 10 + 22 + 10 + 12 + 10 + 12 = 7 + 10 + 22 + 10 + 12 + 10 + 12 = 7 + 10 = 17 \] \[ 17 + 22 = 39 \] \[ 39 + 10 = 49 \] \[ 49 + 12 = 61 \] \[ 61 + 10 = 71 \] \[ 71 + 12 = 83 \]
Now we have a total life span of 83 years.
Next, we need to divide this total by the number of farm animals. There are 7 animals in total:
\[ \text{Mean} = \frac{\text{Total Life Span}}{\text{Number of Animals}} = \frac{83}{7} \approx 11.86 \]
Rounding this to one decimal place gives us approximately 11.9 years.
So, the mean life span of the farm animals is 11.9 years.
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